cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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exfat_raw.h (4394B)

      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
     11#define BOOT_SIGNATURE		0xAA55
     12#define EXBOOT_SIGNATURE	0xAA550000
     13#define STR_EXFAT		"EXFAT   "	/* size should be 8 */
     14
     15#define EXFAT_MAX_FILE_LEN	255
     16
     17#define VOLUME_DIRTY		0x0002
     18#define MEDIA_FAILURE		0x0004
     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 */
     30#define ALLOC_FAT_CHAIN		0x01
     31#define ALLOC_NO_FAT_CHAIN	0x03
     32
     33#define DENTRY_SIZE		32 /* directory entry size */
     34#define DENTRY_SIZE_BITS	5
     35/* exFAT allows 8388608(256MB) directory entries */
     36#define MAX_EXFAT_DENTRIES	8388608
     37
     38/* dentry types */
     39#define EXFAT_UNUSED		0x00	/* end of directory */
     40#define EXFAT_DELETE		(~0x80)
     41#define IS_EXFAT_DELETED(x)	((x) < 0x80) /* deleted file (0x01~0x7F) */
     42#define EXFAT_INVAL		0x80	/* invalid value */
     43#define EXFAT_BITMAP		0x81	/* allocation bitmap */
     44#define EXFAT_UPCASE		0x82	/* upcase table */
     45#define EXFAT_VOLUME		0x83	/* volume label */
     46#define EXFAT_FILE		0x85	/* file or dir */
     47#define EXFAT_GUID		0xA0
     48#define EXFAT_PADDING		0xA1
     49#define EXFAT_ACLTAB		0xA2
     50#define EXFAT_STREAM		0xC0	/* stream entry */
     51#define EXFAT_NAME		0xC1	/* file name entry */
     52#define EXFAT_ACL		0xC2	/* stream entry */
     53
     54#define IS_EXFAT_CRITICAL_PRI(x)	(x < 0xA0)
     55#define IS_EXFAT_BENIGN_PRI(x)		(x < 0xC0)
     56#define IS_EXFAT_CRITICAL_SEC(x)	(x < 0xE0)
     57
     58/* checksum types */
     59#define CS_DIR_ENTRY		0
     60#define CS_BOOT_SECTOR		1
     61#define CS_DEFAULT		2
     62
     63/* file attributes */
     64#define ATTR_READONLY		0x0001
     65#define ATTR_HIDDEN		0x0002
     66#define ATTR_SYSTEM		0x0004
     67#define ATTR_VOLUME		0x0008
     68#define ATTR_SUBDIR		0x0010
     69#define ATTR_ARCHIVE		0x0020
     70
     71#define ATTR_RWMASK		(ATTR_HIDDEN | ATTR_SYSTEM | ATTR_VOLUME | \
     72				 ATTR_SUBDIR | ATTR_ARCHIVE)
     73
     74#define BOOTSEC_JUMP_BOOT_LEN		3
     75#define BOOTSEC_FS_NAME_LEN		8
     76#define BOOTSEC_OLDBPB_LEN		53
     77
     78#define EXFAT_FILE_NAME_LEN		15
     79
     80#define EXFAT_MIN_SECT_SIZE_BITS		9
     81#define EXFAT_MAX_SECT_SIZE_BITS		12
     82#define EXFAT_MAX_SECT_PER_CLUS_BITS(x)		(25 - (x)->sect_size_bits)
     83
     84/* EXFAT: Main and Backup Boot Sector (512 bytes) */
     85struct boot_sector {
     86	__u8	jmp_boot[BOOTSEC_JUMP_BOOT_LEN];
     87	__u8	fs_name[BOOTSEC_FS_NAME_LEN];
     88	__u8	must_be_zero[BOOTSEC_OLDBPB_LEN];
     89	__le64	partition_offset;
     90	__le64	vol_length;
     91	__le32	fat_offset;
     92	__le32	fat_length;
     93	__le32	clu_offset;
     94	__le32	clu_count;
     95	__le32	root_cluster;
     96	__le32	vol_serial;
     97	__u8	fs_revision[2];
     98	__le16	vol_flags;
     99	__u8	sect_size_bits;
    100	__u8	sect_per_clus_bits;
    101	__u8	num_fats;
    102	__u8	drv_sel;
    103	__u8	percent_in_use;
    104	__u8	reserved[7];
    105	__u8	boot_code[390];
    106	__le16	signature;
    107} __packed;
    108
    109struct exfat_dentry {
    110	__u8 type;
    111	union {
    112		struct {
    113			__u8 num_ext;
    114			__le16 checksum;
    115			__le16 attr;
    116			__le16 reserved1;
    117			__le16 create_time;
    118			__le16 create_date;
    119			__le16 modify_time;
    120			__le16 modify_date;
    121			__le16 access_time;
    122			__le16 access_date;
    123			__u8 create_time_cs;
    124			__u8 modify_time_cs;
    125			__u8 create_tz;
    126			__u8 modify_tz;
    127			__u8 access_tz;
    128			__u8 reserved2[7];
    129		} __packed file; /* file directory entry */
    130		struct {
    131			__u8 flags;
    132			__u8 reserved1;
    133			__u8 name_len;
    134			__le16 name_hash;
    135			__le16 reserved2;
    136			__le64 valid_size;
    137			__le32 reserved3;
    138			__le32 start_clu;
    139			__le64 size;
    140		} __packed stream; /* stream extension directory entry */
    141		struct {
    142			__u8 flags;
    143			__le16 unicode_0_14[EXFAT_FILE_NAME_LEN];
    144		} __packed name; /* file name directory entry */
    145		struct {
    146			__u8 flags;
    147			__u8 reserved[18];
    148			__le32 start_clu;
    149			__le64 size;
    150		} __packed bitmap; /* allocation bitmap directory entry */
    151		struct {
    152			__u8 reserved1[3];
    153			__le32 checksum;
    154			__u8 reserved2[12];
    155			__le32 start_clu;
    156			__le64 size;
    157		} __packed upcase; /* up-case table directory entry */
    158	} __packed dentry;
    159} __packed;
    160
    161#define EXFAT_TZ_VALID		(1 << 7)
    162
    163/* Jan 1 GMT 00:00:00 1980 */
    164#define EXFAT_MIN_TIMESTAMP_SECS    315532800LL
    165/* Dec 31 GMT 23:59:59 2107 */
    166#define EXFAT_MAX_TIMESTAMP_SECS    4354819199LL
    167
    168#endif /* !_EXFAT_RAW_H */