[mirror_ubuntu-jammy-kernel.git] / fs / exfat / exfat_raw.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
 */

#ifndef _EXFAT_RAW_H
#define _EXFAT_RAW_H

#include <linux/types.h>

#define BOOT_SIGNATURE		0xAA55
#define EXBOOT_SIGNATURE	0xAA550000

#define EXFAT_MAX_FILE_LEN	255

#define VOL_CLEAN		0x0000
#define VOL_DIRTY		0x0002

#define EXFAT_EOF_CLUSTER	0xFFFFFFFFu
#define EXFAT_BAD_CLUSTER	0xFFFFFFF7u
#define EXFAT_FREE_CLUSTER	0
/* Cluster 0, 1 are reserved, the first cluster is 2 in the cluster heap. */
#define EXFAT_RESERVED_CLUSTERS	2
#define EXFAT_FIRST_CLUSTER	2
#define EXFAT_DATA_CLUSTER_COUNT(sbi)	\
	((sbi)->num_clusters - EXFAT_RESERVED_CLUSTERS)

/* AllocationPossible and NoFatChain field in GeneralSecondaryFlags Field */
#define ALLOC_FAT_CHAIN		0x01
#define ALLOC_NO_FAT_CHAIN	0x03

#define DENTRY_SIZE		32 /* directory entry size */
#define DENTRY_SIZE_BITS	5
/* exFAT allows 8388608(256MB) directory entries */
#define MAX_EXFAT_DENTRIES	8388608

/* dentry types */
#define EXFAT_UNUSED		0x00	/* end of directory */
#define EXFAT_DELETE		(~0x80)
#define IS_EXFAT_DELETED(x)	((x) < 0x80) /* deleted file (0x01~0x7F) */
#define EXFAT_INVAL		0x80	/* invalid value */
#define EXFAT_BITMAP		0x81	/* allocation bitmap */
#define EXFAT_UPCASE		0x82	/* upcase table */
#define EXFAT_VOLUME		0x83	/* volume label */
#define EXFAT_FILE		0x85	/* file or dir */
#define EXFAT_GUID		0xA0
#define EXFAT_PADDING		0xA1
#define EXFAT_ACLTAB		0xA2
#define EXFAT_STREAM		0xC0	/* stream entry */
#define EXFAT_NAME		0xC1	/* file name entry */
#define EXFAT_ACL		0xC2	/* stream entry */

#define IS_EXFAT_CRITICAL_PRI(x)	(x < 0xA0)
#define IS_EXFAT_BENIGN_PRI(x)		(x < 0xC0)
#define IS_EXFAT_CRITICAL_SEC(x)	(x < 0xE0)

/* checksum types */
#define CS_DIR_ENTRY		0
#define CS_BOOT_SECTOR		1
#define CS_DEFAULT		2

/* file attributes */
#define ATTR_READONLY		0x0001
#define ATTR_HIDDEN		0x0002
#define ATTR_SYSTEM		0x0004
#define ATTR_VOLUME		0x0008
#define ATTR_SUBDIR		0x0010
#define ATTR_ARCHIVE		0x0020

#define ATTR_RWMASK		(ATTR_HIDDEN | ATTR_SYSTEM | ATTR_VOLUME | \
				 ATTR_SUBDIR | ATTR_ARCHIVE)

#define BOOTSEC_JUMP_BOOT_LEN		3
#define BOOTSEC_FS_NAME_LEN		8
#define BOOTSEC_OLDBPB_LEN		53

#define EXFAT_FILE_NAME_LEN		15

/* EXFAT: Main and Backup Boot Sector (512 bytes) */
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 */
	} __packed dentry;
} __packed;

#define EXFAT_TZ_VALID		(1 << 7)

/* Jan 1 GMT 00:00:00 1980 */
#define EXFAT_MIN_TIMESTAMP_SECS    315532800LL
/* Dec 31 GMT 23:59:59 2107 */
#define EXFAT_MAX_TIMESTAMP_SECS    4354819199LL

#endif /* !_EXFAT_RAW_H */
Commit	Line	Data
1acf1a56 NJ	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
	2	/*
	3	* Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
	4	*/
	5
	6	#ifndef _EXFAT_RAW_H
	7	#define _EXFAT_RAW_H
	8
	9	#include <linux/types.h>
	10
181a9e80 TK	11	#define BOOT_SIGNATURE 0xAA55
181a9e80 TK	12	#define EXBOOT_SIGNATURE 0xAA550000
1acf1a56 NJ	13
	14	#define EXFAT_MAX_FILE_LEN 255
	15
	16	#define VOL_CLEAN 0x0000
	17	#define VOL_DIRTY 0x0002
	18
	19	#define EXFAT_EOF_CLUSTER 0xFFFFFFFFu
	20	#define EXFAT_BAD_CLUSTER 0xFFFFFFF7u
	21	#define EXFAT_FREE_CLUSTER 0
	22	/* Cluster 0, 1 are reserved, the first cluster is 2 in the cluster heap. */
	23	#define EXFAT_RESERVED_CLUSTERS 2
	24	#define EXFAT_FIRST_CLUSTER 2
	25	#define EXFAT_DATA_CLUSTER_COUNT(sbi) \
	26	((sbi)->num_clusters - EXFAT_RESERVED_CLUSTERS)
	27
	28	/* AllocationPossible and NoFatChain field in GeneralSecondaryFlags Field */
	29	#define ALLOC_FAT_CHAIN 0x01
	30	#define ALLOC_NO_FAT_CHAIN 0x03
	31
	32	#define DENTRY_SIZE 32 /* directory entry size */
	33	#define DENTRY_SIZE_BITS 5
	34	/* exFAT allows 8388608(256MB) directory entries */
	35	#define MAX_EXFAT_DENTRIES 8388608
	36
	37	/* dentry types */
	38	#define EXFAT_UNUSED 0x00 /* end of directory */
	39	#define EXFAT_DELETE (~0x80)
	40	#define IS_EXFAT_DELETED(x) ((x) < 0x80) /* deleted file (0x01~0x7F) */
	41	#define EXFAT_INVAL 0x80 /* invalid value */
	42	#define EXFAT_BITMAP 0x81 /* allocation bitmap */
	43	#define EXFAT_UPCASE 0x82 /* upcase table */
	44	#define EXFAT_VOLUME 0x83 /* volume label */
	45	#define EXFAT_FILE 0x85 /* file or dir */
	46	#define EXFAT_GUID 0xA0
	47	#define EXFAT_PADDING 0xA1
	48	#define EXFAT_ACLTAB 0xA2
	49	#define EXFAT_STREAM 0xC0 /* stream entry */
	50	#define EXFAT_NAME 0xC1 /* file name entry */
	51	#define EXFAT_ACL 0xC2 /* stream entry */
	52
	53	#define IS_EXFAT_CRITICAL_PRI(x) (x < 0xA0)
	54	#define IS_EXFAT_BENIGN_PRI(x) (x < 0xC0)
	55	#define IS_EXFAT_CRITICAL_SEC(x) (x < 0xE0)
	56
	57	/* checksum types */
	58	#define CS_DIR_ENTRY 0
181a9e80	59	#define CS_BOOT_SECTOR 1
1acf1a56 NJ	60	#define CS_DEFAULT 2
	61
	62	/* file attributes */
	63	#define ATTR_READONLY 0x0001
	64	#define ATTR_HIDDEN 0x0002
	65	#define ATTR_SYSTEM 0x0004
	66	#define ATTR_VOLUME 0x0008
	67	#define ATTR_SUBDIR 0x0010
	68	#define ATTR_ARCHIVE 0x0020
	69
	70	#define ATTR_RWMASK (ATTR_HIDDEN \| ATTR_SYSTEM \| ATTR_VOLUME \| \
	71	ATTR_SUBDIR \| ATTR_ARCHIVE)
	72
181a9e80 TK	73	#define BOOTSEC_JUMP_BOOT_LEN 3
	74	#define BOOTSEC_FS_NAME_LEN 8
	75	#define BOOTSEC_OLDBPB_LEN 53
1acf1a56 NJ	76
	77	#define EXFAT_FILE_NAME_LEN 15
	78
181a9e80 TK	79	/* EXFAT: Main and Backup Boot Sector (512 bytes) */
	80	struct boot_sector {
	81	__u8 jmp_boot[BOOTSEC_JUMP_BOOT_LEN];
	82	__u8 fs_name[BOOTSEC_FS_NAME_LEN];
	83	__u8 must_be_zero[BOOTSEC_OLDBPB_LEN];
	84	__le64 partition_offset;
	85	__le64 vol_length;
	86	__le32 fat_offset;
	87	__le32 fat_length;
	88	__le32 clu_offset;
	89	__le32 clu_count;
	90	__le32 root_cluster;
	91	__le32 vol_serial;
	92	__u8 fs_revision[2];
	93	__le16 vol_flags;
	94	__u8 sect_size_bits;
	95	__u8 sect_per_clus_bits;
	96	__u8 num_fats;
	97	__u8 drv_sel;
	98	__u8 percent_in_use;
	99	__u8 reserved[7];
	100	__u8 boot_code[390];
	101	__le16 signature;
1acf1a56 NJ	102	} __packed;
	103
	104	struct exfat_dentry {
	105	__u8 type;
	106	union {
	107	struct {
	108	__u8 num_ext;
	109	__le16 checksum;
	110	__le16 attr;
	111	__le16 reserved1;
	112	__le16 create_time;
	113	__le16 create_date;
	114	__le16 modify_time;
	115	__le16 modify_date;
	116	__le16 access_time;
	117	__le16 access_date;
ed0f84d3 TK	118	__u8 create_time_cs;
ed0f84d3 TK	119	__u8 modify_time_cs;
1acf1a56 NJ	120	__u8 create_tz;
	121	__u8 modify_tz;
	122	__u8 access_tz;
	123	__u8 reserved2[7];
	124	} __packed file; /* file directory entry */
	125	struct {
	126	__u8 flags;
	127	__u8 reserved1;
	128	__u8 name_len;
	129	__le16 name_hash;
	130	__le16 reserved2;
	131	__le64 valid_size;
	132	__le32 reserved3;
	133	__le32 start_clu;
	134	__le64 size;
	135	} __packed stream; /* stream extension directory entry */
	136	struct {
	137	__u8 flags;
	138	__le16 unicode_0_14[EXFAT_FILE_NAME_LEN];
	139	} __packed name; /* file name directory entry */
	140	struct {
	141	__u8 flags;
	142	__u8 reserved[18];
	143	__le32 start_clu;
	144	__le64 size;
	145	} __packed bitmap; /* allocation bitmap directory entry */
	146	struct {
	147	__u8 reserved1[3];
	148	__le32 checksum;
	149	__u8 reserved2[12];
	150	__le32 start_clu;
	151	__le64 size;
	152	} __packed upcase; /* up-case table directory entry */
	153	} __packed dentry;
	154	} __packed;
	155
	156	#define EXFAT_TZ_VALID (1 << 7)
	157
	158	/* Jan 1 GMT 00:00:00 1980 */
	159	#define EXFAT_MIN_TIMESTAMP_SECS 315532800LL
	160	/* Dec 31 GMT 23:59:59 2107 */
	161	#define EXFAT_MAX_TIMESTAMP_SECS 4354819199LL
	162
	163	#endif /* !_EXFAT_RAW_H */