[linux-block.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 STR_EXFAT		"EXFAT   "	/* size should be 8 */

#define EXFAT_MAX_FILE_LEN	255

#define VOLUME_DIRTY		0x0002
#define MEDIA_FAILURE		0x0004

#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_POSSIBLE		0x01
#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 EXFAT_VENDOR_EXT	0xE0	/* vendor extension entry */
#define EXFAT_VENDOR_ALLOC	0xE1	/* vendor allocation 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

#define EXFAT_MIN_SECT_SIZE_BITS		9
#define EXFAT_MAX_SECT_SIZE_BITS		12
#define EXFAT_MAX_SECT_PER_CLUS_BITS(x)		(25 - (x)->sect_size_bits)

/* 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 */
		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 */
		struct {
			__u8 flags;
			__u8 custom_defined[18];
			__le32 start_clu;
			__le64 size;
		} __packed generic_secondary; /* generic secondary 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
33404a15	13	#define STR_EXFAT "EXFAT " /* size should be 8 */
1acf1a56 NJ	14
	15	#define EXFAT_MAX_FILE_LEN 255
	16
7018ec68 TK	17	#define VOLUME_DIRTY 0x0002
7018ec68 TK	18	#define MEDIA_FAILURE 0x0004
1acf1a56 NJ	19
	20	#define EXFAT_EOF_CLUSTER 0xFFFFFFFFu
	21	#define EXFAT_BAD_CLUSTER 0xFFFFFFF7u
	22	#define EXFAT_FREE_CLUSTER 0
	23	/* Cluster 0, 1 are reserved, the first cluster is 2 in the cluster heap. */
	24	#define EXFAT_RESERVED_CLUSTERS 2
	25	#define EXFAT_FIRST_CLUSTER 2
	26	#define EXFAT_DATA_CLUSTER_COUNT(sbi) \
	27	((sbi)->num_clusters - EXFAT_RESERVED_CLUSTERS)
	28
	29	/* AllocationPossible and NoFatChain field in GeneralSecondaryFlags Field */
8258ef28	30	#define ALLOC_POSSIBLE 0x01
1acf1a56 NJ	31	#define ALLOC_FAT_CHAIN 0x01
	32	#define ALLOC_NO_FAT_CHAIN 0x03
	33
	34	#define DENTRY_SIZE 32 /* directory entry size */
	35	#define DENTRY_SIZE_BITS 5
	36	/* exFAT allows 8388608(256MB) directory entries */
	37	#define MAX_EXFAT_DENTRIES 8388608
	38
	39	/* dentry types */
	40	#define EXFAT_UNUSED 0x00 /* end of directory */
	41	#define EXFAT_DELETE (~0x80)
	42	#define IS_EXFAT_DELETED(x) ((x) < 0x80) /* deleted file (0x01~0x7F) */
	43	#define EXFAT_INVAL 0x80 /* invalid value */
	44	#define EXFAT_BITMAP 0x81 /* allocation bitmap */
	45	#define EXFAT_UPCASE 0x82 /* upcase table */
	46	#define EXFAT_VOLUME 0x83 /* volume label */
	47	#define EXFAT_FILE 0x85 /* file or dir */
	48	#define EXFAT_GUID 0xA0
	49	#define EXFAT_PADDING 0xA1
	50	#define EXFAT_ACLTAB 0xA2
	51	#define EXFAT_STREAM 0xC0 /* stream entry */
	52	#define EXFAT_NAME 0xC1 /* file name entry */
	53	#define EXFAT_ACL 0xC2 /* stream entry */
8258ef28 NJ	54	#define EXFAT_VENDOR_EXT 0xE0 /* vendor extension entry */
8258ef28 NJ	55	#define EXFAT_VENDOR_ALLOC 0xE1 /* vendor allocation entry */
1acf1a56 NJ	56
	57	#define IS_EXFAT_CRITICAL_PRI(x) (x < 0xA0)
	58	#define IS_EXFAT_BENIGN_PRI(x) (x < 0xC0)
	59	#define IS_EXFAT_CRITICAL_SEC(x) (x < 0xE0)
	60
	61	/* checksum types */
	62	#define CS_DIR_ENTRY 0
181a9e80	63	#define CS_BOOT_SECTOR 1
1acf1a56 NJ	64	#define CS_DEFAULT 2
	65
	66	/* file attributes */
	67	#define ATTR_READONLY 0x0001
	68	#define ATTR_HIDDEN 0x0002
	69	#define ATTR_SYSTEM 0x0004
	70	#define ATTR_VOLUME 0x0008
	71	#define ATTR_SUBDIR 0x0010
	72	#define ATTR_ARCHIVE 0x0020
	73
	74	#define ATTR_RWMASK (ATTR_HIDDEN \| ATTR_SYSTEM \| ATTR_VOLUME \| \
	75	ATTR_SUBDIR \| ATTR_ARCHIVE)
	76
181a9e80 TK	77	#define BOOTSEC_JUMP_BOOT_LEN 3
	78	#define BOOTSEC_FS_NAME_LEN 8
	79	#define BOOTSEC_OLDBPB_LEN 53
1acf1a56 NJ	80
	81	#define EXFAT_FILE_NAME_LEN 15
	82
78c276f5 NJ	83	#define EXFAT_MIN_SECT_SIZE_BITS 9
	84	#define EXFAT_MAX_SECT_SIZE_BITS 12
	85	#define EXFAT_MAX_SECT_PER_CLUS_BITS(x) (25 - (x)->sect_size_bits)
	86
181a9e80 TK	87	/* EXFAT: Main and Backup Boot Sector (512 bytes) */
	88	struct boot_sector {
	89	__u8 jmp_boot[BOOTSEC_JUMP_BOOT_LEN];
	90	__u8 fs_name[BOOTSEC_FS_NAME_LEN];
	91	__u8 must_be_zero[BOOTSEC_OLDBPB_LEN];
	92	__le64 partition_offset;
	93	__le64 vol_length;
	94	__le32 fat_offset;
	95	__le32 fat_length;
	96	__le32 clu_offset;
	97	__le32 clu_count;
	98	__le32 root_cluster;
	99	__le32 vol_serial;
	100	__u8 fs_revision[2];
	101	__le16 vol_flags;
	102	__u8 sect_size_bits;
	103	__u8 sect_per_clus_bits;
	104	__u8 num_fats;
	105	__u8 drv_sel;
	106	__u8 percent_in_use;
	107	__u8 reserved[7];
	108	__u8 boot_code[390];
	109	__le16 signature;
1acf1a56 NJ	110	} __packed;
	111
	112	struct exfat_dentry {
	113	__u8 type;
	114	union {
	115	struct {
	116	__u8 num_ext;
	117	__le16 checksum;
	118	__le16 attr;
	119	__le16 reserved1;
	120	__le16 create_time;
	121	__le16 create_date;
	122	__le16 modify_time;
	123	__le16 modify_date;
	124	__le16 access_time;
	125	__le16 access_date;
ed0f84d3 TK	126	__u8 create_time_cs;
ed0f84d3 TK	127	__u8 modify_time_cs;
1acf1a56 NJ	128	__u8 create_tz;
	129	__u8 modify_tz;
	130	__u8 access_tz;
	131	__u8 reserved2[7];
	132	} __packed file; /* file directory entry */
	133	struct {
	134	__u8 flags;
	135	__u8 reserved1;
	136	__u8 name_len;
	137	__le16 name_hash;
	138	__le16 reserved2;
	139	__le64 valid_size;
	140	__le32 reserved3;
	141	__le32 start_clu;
	142	__le64 size;
	143	} __packed stream; /* stream extension directory entry */
	144	struct {
	145	__u8 flags;
	146	__le16 unicode_0_14[EXFAT_FILE_NAME_LEN];
	147	} __packed name; /* file name directory entry */
	148	struct {
	149	__u8 flags;
	150	__u8 reserved[18];
	151	__le32 start_clu;
	152	__le64 size;
	153	} __packed bitmap; /* allocation bitmap directory entry */
	154	struct {
	155	__u8 reserved1[3];
	156	__le32 checksum;
	157	__u8 reserved2[12];
	158	__le32 start_clu;
	159	__le64 size;
	160	} __packed upcase; /* up-case table directory entry */
8258ef28 NJ	161	struct {
	162	__u8 flags;
	163	__u8 vendor_guid[16];
	164	__u8 vendor_defined[14];
	165	} __packed vendor_ext; /* vendor extension directory entry */
	166	struct {
	167	__u8 flags;
	168	__u8 vendor_guid[16];
	169	__u8 vendor_defined[2];
	170	__le32 start_clu;
	171	__le64 size;
	172	} __packed vendor_alloc; /* vendor allocation directory entry */
	173	struct {
	174	__u8 flags;
	175	__u8 custom_defined[18];
	176	__le32 start_clu;
	177	__le64 size;
	178	} __packed generic_secondary; /* generic secondary directory entry */
1acf1a56 NJ	179	} __packed dentry;
	180	} __packed;
	181
	182	#define EXFAT_TZ_VALID (1 << 7)
	183
	184	/* Jan 1 GMT 00:00:00 1980 */
	185	#define EXFAT_MIN_TIMESTAMP_SECS 315532800LL
	186	/* Dec 31 GMT 23:59:59 2107 */
	187	#define EXFAT_MAX_TIMESTAMP_SECS 4354819199LL
	188
	189	#endif /* !_EXFAT_RAW_H */