fs/udf/udf_sb.h

Source file repositories/reference/linux-study-clean/fs/udf/udf_sb.h

File Facts

System
Linux kernel
Corpus path
fs/udf/udf_sb.h
Extension
.h
Size
4366 bytes
Lines
184
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 udf_meta_data {
	__u32	s_meta_file_loc;
	__u32	s_mirror_file_loc;
	__u32	s_bitmap_file_loc;
	__u32	s_alloc_unit_size;
	__u16	s_align_unit_size;
	/*
	 * Partition Reference Number of the associated physical / sparable
	 * partition
	 */
	__u16   s_phys_partition_ref;
	int	s_flags;
	struct inode *s_metadata_fe;
	struct inode *s_mirror_fe;
	struct inode *s_bitmap_fe;
};

struct udf_sparing_data {
	__u16	s_packet_len;
	struct buffer_head *s_spar_map[4];
};

struct udf_virtual_data {
	__u32	s_num_entries;
	__u16	s_start_offset;
};

struct udf_bitmap {
	__u32			s_extPosition;
	int			s_nr_groups;
	struct buffer_head	*s_block_bitmap[] __counted_by(s_nr_groups);
};

struct udf_part_map {
	union {
		struct udf_bitmap	*s_bitmap;
		struct inode		*s_table;
	} s_uspace;
	__u32	s_partition_root;
	__u32	s_partition_len;
	__u16	s_partition_type;
	__u16	s_partition_num;
	union {
		struct udf_sparing_data s_sparing;
		struct udf_virtual_data s_virtual;
		struct udf_meta_data s_metadata;
	} s_type_specific;
	__u32	(*s_partition_func)(struct super_block *, __u32, __u16, __u32);
	__u16	s_volumeseqnum;
	__u16	s_partition_flags;
};

#pragma pack()

struct udf_sb_info {
	struct udf_part_map	*s_partmaps;
	__u8			s_volume_ident[32];

	/* Overall info */
	__u16			s_partitions;
	__u16			s_partition;

	/* Sector headers */
	__s32			s_session;
	__u32			s_anchor;
	__u32			s_last_block;

	struct buffer_head	*s_lvid_bh;

	/* Default permissions */
	umode_t			s_umask;
	kgid_t			s_gid;
	kuid_t			s_uid;
	umode_t			s_fmode;
	umode_t			s_dmode;
	/* Lock protecting consistency of above permission settings */
	rwlock_t		s_cred_lock;

	/* Root Info */
	struct timespec64	s_record_time;

	/* Fileset Info */
	__u16			s_serial_number;

	/* highest UDF revision we have recorded to this media */
	__u16			s_udfrev;

	/* Miscellaneous flags */
	unsigned long		s_flags;

Annotation

Implementation Notes