1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 2) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 3) * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 4) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 5)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 6) #ifndef _EXFAT_FS_H
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 7) #define _EXFAT_FS_H
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 8)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 9) #include <linux/fs.h>
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 10) #include <linux/ratelimit.h>
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 11) #include <linux/nls.h>
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 12)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 13) #define EXFAT_SUPER_MAGIC 0x2011BAB0UL
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 14) #define EXFAT_ROOT_INO 1
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 15)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 16) #define EXFAT_CLUSTERS_UNTRACKED (~0u)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 17)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 18) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 19) * exfat error flags
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 20) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 21) enum exfat_error_mode {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 22) EXFAT_ERRORS_CONT, /* ignore error and continue */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 23) EXFAT_ERRORS_PANIC, /* panic on error */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 24) EXFAT_ERRORS_RO, /* remount r/o on error */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 25) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 26)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 27) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 28) * exfat nls lossy flag
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 29) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 30) enum {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 31) NLS_NAME_NO_LOSSY, /* no lossy */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 32) NLS_NAME_LOSSY, /* just detected incorrect filename(s) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 33) NLS_NAME_OVERLEN, /* the length is over than its limit */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 34) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 35)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 36) #define EXFAT_HASH_BITS 8
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 37) #define EXFAT_HASH_SIZE (1UL << EXFAT_HASH_BITS)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 38)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 39) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 40) * Type Definitions
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 41) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 42) #define ES_2_ENTRIES 2
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 43) #define ES_ALL_ENTRIES 0
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 44)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 45) #define DIR_DELETED 0xFFFF0321
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 46)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 47) /* type values */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 48) #define TYPE_UNUSED 0x0000
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 49) #define TYPE_DELETED 0x0001
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 50) #define TYPE_INVALID 0x0002
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 51) #define TYPE_CRITICAL_PRI 0x0100
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 52) #define TYPE_BITMAP 0x0101
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 53) #define TYPE_UPCASE 0x0102
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 54) #define TYPE_VOLUME 0x0103
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 55) #define TYPE_DIR 0x0104
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 56) #define TYPE_FILE 0x011F
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 57) #define TYPE_CRITICAL_SEC 0x0200
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 58) #define TYPE_STREAM 0x0201
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 59) #define TYPE_EXTEND 0x0202
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 60) #define TYPE_ACL 0x0203
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 61) #define TYPE_BENIGN_PRI 0x0400
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 62) #define TYPE_GUID 0x0401
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 63) #define TYPE_PADDING 0x0402
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 64) #define TYPE_ACLTAB 0x0403
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 65) #define TYPE_BENIGN_SEC 0x0800
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 66) #define TYPE_ALL 0x0FFF
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 67)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 68) #define MAX_CHARSET_SIZE 6 /* max size of multi-byte character */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 69) #define MAX_NAME_LENGTH 255 /* max len of file name excluding NULL */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 70) #define MAX_VFSNAME_BUF_SIZE ((MAX_NAME_LENGTH + 1) * MAX_CHARSET_SIZE)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 71)
943af1fdacfeb (Tetsuhiro Kohada 2020-05-20 16:56:41 +0900 72) /* Enough size to hold 256 dentry (even 512 Byte sector) */
943af1fdacfeb (Tetsuhiro Kohada 2020-05-20 16:56:41 +0900 73) #define DIR_CACHE_SIZE (256*sizeof(struct exfat_dentry)/512+1)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 74)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 75) #define EXFAT_HINT_NONE -1
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 76) #define EXFAT_MIN_SUBDIR 2
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 77)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 78) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 79) * helpers for cluster size to byte conversion.
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 80) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 81) #define EXFAT_CLU_TO_B(b, sbi) ((b) << (sbi)->cluster_size_bits)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 82) #define EXFAT_B_TO_CLU(b, sbi) ((b) >> (sbi)->cluster_size_bits)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 83) #define EXFAT_B_TO_CLU_ROUND_UP(b, sbi) \
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 84) (((b - 1) >> (sbi)->cluster_size_bits) + 1)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 85) #define EXFAT_CLU_OFFSET(off, sbi) ((off) & ((sbi)->cluster_size - 1))
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 86)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 87) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 88) * helpers for block size to byte conversion.
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 89) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 90) #define EXFAT_BLK_TO_B(b, sb) ((b) << (sb)->s_blocksize_bits)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 91) #define EXFAT_B_TO_BLK(b, sb) ((b) >> (sb)->s_blocksize_bits)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 92) #define EXFAT_B_TO_BLK_ROUND_UP(b, sb) \
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 93) (((b - 1) >> (sb)->s_blocksize_bits) + 1)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 94) #define EXFAT_BLK_OFFSET(off, sb) ((off) & ((sb)->s_blocksize - 1))
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 95)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 96) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 97) * helpers for block size to dentry size conversion.
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 98) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 99) #define EXFAT_B_TO_DEN_IDX(b, sbi) \
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 100) ((b) << ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS))
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 101) #define EXFAT_B_TO_DEN(b) ((b) >> DENTRY_SIZE_BITS)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 102) #define EXFAT_DEN_TO_B(b) ((b) << DENTRY_SIZE_BITS)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 103)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 104) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 105) * helpers for fat entry.
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 106) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 107) #define FAT_ENT_SIZE (4)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 108) #define FAT_ENT_SIZE_BITS (2)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 109) #define FAT_ENT_OFFSET_SECTOR(sb, loc) (EXFAT_SB(sb)->FAT1_start_sector + \
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 110) (((u64)loc << FAT_ENT_SIZE_BITS) >> sb->s_blocksize_bits))
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 111) #define FAT_ENT_OFFSET_BYTE_IN_SECTOR(sb, loc) \
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 112) ((loc << FAT_ENT_SIZE_BITS) & (sb->s_blocksize - 1))
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 113)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 114) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 115) * helpers for bitmap.
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 116) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 117) #define CLUSTER_TO_BITMAP_ENT(clu) ((clu) - EXFAT_RESERVED_CLUSTERS)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 118) #define BITMAP_ENT_TO_CLUSTER(ent) ((ent) + EXFAT_RESERVED_CLUSTERS)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 119) #define BITS_PER_SECTOR(sb) ((sb)->s_blocksize * BITS_PER_BYTE)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 120) #define BITS_PER_SECTOR_MASK(sb) (BITS_PER_SECTOR(sb) - 1)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 121) #define BITMAP_OFFSET_SECTOR_INDEX(sb, ent) \
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 122) ((ent / BITS_PER_BYTE) >> (sb)->s_blocksize_bits)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 123) #define BITMAP_OFFSET_BIT_IN_SECTOR(sb, ent) (ent & BITS_PER_SECTOR_MASK(sb))
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 124) #define BITMAP_OFFSET_BYTE_IN_SECTOR(sb, ent) \
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 125) ((ent / BITS_PER_BYTE) & ((sb)->s_blocksize - 1))
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 126) #define BITS_PER_BYTE_MASK 0x7
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 127) #define IGNORED_BITS_REMAINED(clu, clu_base) ((1 << ((clu) - (clu_base))) - 1)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 128)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 129) struct exfat_dentry_namebuf {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 130) char *lfn;
9e456aeaacb6b (Namjae Jeon 2020-08-14 11:03:46 +0900 131) int lfnbuf_len; /* usually MAX_UNINAME_BUF_SIZE */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 132) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 133)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 134) /* unicode name structure */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 135) struct exfat_uni_name {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 136) /* +3 for null and for converting */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 137) unsigned short name[MAX_NAME_LENGTH + 3];
5875bf287d953 (Tetsuhiro Kohada 2020-05-29 19:14:59 +0900 138) u16 name_hash;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 139) unsigned char name_len;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 140) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 141)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 142) /* directory structure */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 143) struct exfat_chain {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 144) unsigned int dir;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 145) unsigned int size;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 146) unsigned char flags;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 147) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 148)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 149) /* first empty entry hint information */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 150) struct exfat_hint_femp {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 151) /* entry index of a directory */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 152) int eidx;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 153) /* count of continuous empty entry */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 154) int count;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 155) /* the cluster that first empty slot exists in */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 156) struct exfat_chain cur;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 157) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 158)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 159) /* hint structure */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 160) struct exfat_hint {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 161) unsigned int clu;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 162) union {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 163) unsigned int off; /* cluster offset */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 164) int eidx; /* entry index */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 165) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 166) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 167)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 168) struct exfat_entry_set_cache {
943af1fdacfeb (Tetsuhiro Kohada 2020-05-20 16:56:41 +0900 169) struct super_block *sb;
943af1fdacfeb (Tetsuhiro Kohada 2020-05-20 16:56:41 +0900 170) bool modified;
943af1fdacfeb (Tetsuhiro Kohada 2020-05-20 16:56:41 +0900 171) unsigned int start_off;
943af1fdacfeb (Tetsuhiro Kohada 2020-05-20 16:56:41 +0900 172) int num_bh;
943af1fdacfeb (Tetsuhiro Kohada 2020-05-20 16:56:41 +0900 173) struct buffer_head *bh[DIR_CACHE_SIZE];
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 174) unsigned int num_entries;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 175) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 176)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 177) struct exfat_dir_entry {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 178) struct exfat_chain dir;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 179) int entry;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 180) unsigned int type;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 181) unsigned int start_clu;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 182) unsigned char flags;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 183) unsigned short attr;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 184) loff_t size;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 185) unsigned int num_subdirs;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 186) struct timespec64 atime;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 187) struct timespec64 mtime;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 188) struct timespec64 crtime;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 189) struct exfat_dentry_namebuf namebuf;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 190) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 191)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 192) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 193) * exfat mount in-memory data
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 194) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 195) struct exfat_mount_options {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 196) kuid_t fs_uid;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 197) kgid_t fs_gid;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 198) unsigned short fs_fmask;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 199) unsigned short fs_dmask;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 200) /* permission for setting the [am]time */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 201) unsigned short allow_utime;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 202) /* charset for filename input/display */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 203) char *iocharset;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 204) /* on error: continue, panic, remount-ro */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 205) enum exfat_error_mode errors;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 206) unsigned utf8:1, /* Use of UTF-8 character set */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 207) discard:1; /* Issue discard requests on deletions */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 208) int time_offset; /* Offset of timestamps from UTC (in minutes) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 209) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 210)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 211) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 212) * EXFAT file system superblock in-memory data
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 213) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 214) struct exfat_sb_info {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 215) unsigned long long num_sectors; /* num of sectors in volume */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 216) unsigned int num_clusters; /* num of clusters in volume */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 217) unsigned int cluster_size; /* cluster size in bytes */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 218) unsigned int cluster_size_bits;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 219) unsigned int sect_per_clus; /* cluster size in sectors */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 220) unsigned int sect_per_clus_bits;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 221) unsigned long long FAT1_start_sector; /* FAT1 start sector */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 222) unsigned long long FAT2_start_sector; /* FAT2 start sector */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 223) unsigned long long data_start_sector; /* data area start sector */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 224) unsigned int num_FAT_sectors; /* num of FAT sectors */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 225) unsigned int root_dir; /* root dir cluster */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 226) unsigned int dentries_per_clu; /* num of dentries per cluster */
7018ec68f0824 (Tetsuhiro Kohada 2020-07-31 14:58:26 +0900 227) unsigned int vol_flags; /* volume flags */
7018ec68f0824 (Tetsuhiro Kohada 2020-07-31 14:58:26 +0900 228) unsigned int vol_flags_persistent; /* volume flags to retain */
181a9e8009a8a (Tetsuhiro Kohada 2020-05-29 19:14:56 +0900 229) struct buffer_head *boot_bh; /* buffer_head of BOOT sector */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 230)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 231) unsigned int map_clu; /* allocation bitmap start cluster */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 232) unsigned int map_sectors; /* num of allocation bitmap sectors */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 233) struct buffer_head **vol_amap; /* allocation bitmap */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 234)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 235) unsigned short *vol_utbl; /* upcase table */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 236)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 237) unsigned int clu_srch_ptr; /* cluster search pointer */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 238) unsigned int used_clusters; /* number of used clusters */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 239)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 240) struct mutex s_lock; /* superblock lock */
5c2d728507299 (Hyeongseok Kim 2021-03-02 14:05:20 +0900 241) struct mutex bitmap_lock; /* bitmap lock */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 242) struct exfat_mount_options options;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 243) struct nls_table *nls_io; /* Charset used for input and display */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 244) struct ratelimit_state ratelimit;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 245)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 246) spinlock_t inode_hash_lock;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 247) struct hlist_head inode_hashtable[EXFAT_HASH_SIZE];
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 248)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 249) struct rcu_head rcu;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 250) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 251)
8ff006e57ad3a (Namjae Jeon 2020-09-29 09:09:49 +0900 252) #define EXFAT_CACHE_VALID 0
8ff006e57ad3a (Namjae Jeon 2020-09-29 09:09:49 +0900 253)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 254) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 255) * EXFAT file system inode in-memory data
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 256) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 257) struct exfat_inode_info {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 258) struct exfat_chain dir;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 259) int entry;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 260) unsigned int type;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 261) unsigned short attr;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 262) unsigned int start_clu;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 263) unsigned char flags;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 264) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 265) * the copy of low 32bit of i_version to check
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 266) * the validation of hint_stat.
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 267) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 268) unsigned int version;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 269)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 270) /* hint for cluster last accessed */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 271) struct exfat_hint hint_bmap;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 272) /* hint for entry index we try to lookup next time */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 273) struct exfat_hint hint_stat;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 274) /* hint for first empty entry */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 275) struct exfat_hint_femp hint_femp;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 276)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 277) spinlock_t cache_lru_lock;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 278) struct list_head cache_lru;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 279) int nr_caches;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 280) /* for avoiding the race between alloc and free */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 281) unsigned int cache_valid_id;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 282)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 283) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 284) * NOTE: i_size_ondisk is 64bits, so must hold ->inode_lock to access.
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 285) * physically allocated size.
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 286) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 287) loff_t i_size_ondisk;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 288) /* block-aligned i_size (used in cont_write_begin) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 289) loff_t i_size_aligned;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 290) /* on-disk position of directory entry or 0 */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 291) loff_t i_pos;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 292) /* hash by i_location */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 293) struct hlist_node i_hash_fat;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 294) /* protect bmap against truncate */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 295) struct rw_semaphore truncate_lock;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 296) struct inode vfs_inode;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 297) /* File creation time */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 298) struct timespec64 i_crtime;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 299) };
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 300)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 301) static inline struct exfat_sb_info *EXFAT_SB(struct super_block *sb)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 302) {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 303) return sb->s_fs_info;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 304) }
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 305)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 306) static inline struct exfat_inode_info *EXFAT_I(struct inode *inode)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 307) {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 308) return container_of(inode, struct exfat_inode_info, vfs_inode);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 309) }
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 310)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 311) /*
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 312) * If ->i_mode can't hold 0222 (i.e. ATTR_RO), we use ->i_attrs to
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 313) * save ATTR_RO instead of ->i_mode.
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 314) *
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 315) * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 316) * bit, it's just used as flag for app.
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 317) */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 318) static inline int exfat_mode_can_hold_ro(struct inode *inode)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 319) {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 320) struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 321)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 322) if (S_ISDIR(inode->i_mode))
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 323) return 0;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 324)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 325) if ((~sbi->options.fs_fmask) & 0222)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 326) return 1;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 327) return 0;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 328) }
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 329)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 330) /* Convert attribute bits and a mask to the UNIX mode. */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 331) static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 332) unsigned short attr, mode_t mode)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 333) {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 334) if ((attr & ATTR_READONLY) && !(attr & ATTR_SUBDIR))
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 335) mode &= ~0222;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 336)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 337) if (attr & ATTR_SUBDIR)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 338) return (mode & ~sbi->options.fs_dmask) | S_IFDIR;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 339)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 340) return (mode & ~sbi->options.fs_fmask) | S_IFREG;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 341) }
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 342)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 343) /* Return the FAT attribute byte for this inode */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 344) static inline unsigned short exfat_make_attr(struct inode *inode)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 345) {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 346) unsigned short attr = EXFAT_I(inode)->attr;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 347)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 348) if (S_ISDIR(inode->i_mode))
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 349) attr |= ATTR_SUBDIR;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 350) if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & 0222))
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 351) attr |= ATTR_READONLY;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 352) return attr;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 353) }
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 354)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 355) static inline void exfat_save_attr(struct inode *inode, unsigned short attr)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 356) {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 357) if (exfat_mode_can_hold_ro(inode))
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 358) EXFAT_I(inode)->attr = attr & (ATTR_RWMASK | ATTR_READONLY);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 359) else
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 360) EXFAT_I(inode)->attr = attr & ATTR_RWMASK;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 361) }
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 362)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 363) static inline bool exfat_is_last_sector_in_cluster(struct exfat_sb_info *sbi,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 364) sector_t sec)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 365) {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 366) return ((sec - sbi->data_start_sector + 1) &
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 367) ((1 << sbi->sect_per_clus_bits) - 1)) == 0;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 368) }
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 369)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 370) static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 371) unsigned int clus)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 372) {
43946b70494be (Namjae Jeon 2020-07-03 11:16:32 +0900 373) return ((sector_t)(clus - EXFAT_RESERVED_CLUSTERS) << sbi->sect_per_clus_bits) +
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 374) sbi->data_start_sector;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 375) }
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 376)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 377) static inline int exfat_sector_to_cluster(struct exfat_sb_info *sbi,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 378) sector_t sec)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 379) {
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 380) return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) +
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 381) EXFAT_RESERVED_CLUSTERS;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 382) }
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 383)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 384) /* super.c */
7018ec68f0824 (Tetsuhiro Kohada 2020-07-31 14:58:26 +0900 385) int exfat_set_volume_dirty(struct super_block *sb);
7018ec68f0824 (Tetsuhiro Kohada 2020-07-31 14:58:26 +0900 386) int exfat_clear_volume_dirty(struct super_block *sb);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 387)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 388) /* fatent.c */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 389) #define exfat_get_next_cluster(sb, pclu) exfat_ent_get(sb, *(pclu), pclu)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 390)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 391) int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
23befe490ba88 (Hyeongseok Kim 2021-03-15 13:12:55 +0900 392) struct exfat_chain *p_chain, bool sync_bmap);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 393) int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 394) int exfat_ent_get(struct super_block *sb, unsigned int loc,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 395) unsigned int *content);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 396) int exfat_ent_set(struct super_block *sb, unsigned int loc,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 397) unsigned int content);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 398) int exfat_count_ext_entries(struct super_block *sb, struct exfat_chain *p_dir,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 399) int entry, struct exfat_dentry *p_entry);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 400) int exfat_chain_cont_cluster(struct super_block *sb, unsigned int chain,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 401) unsigned int len);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 402) int exfat_zeroed_cluster(struct inode *dir, unsigned int clu);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 403) int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 404) unsigned int *ret_clu);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 405) int exfat_count_num_clusters(struct super_block *sb,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 406) struct exfat_chain *p_chain, unsigned int *ret_count);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 407)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 408) /* balloc.c */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 409) int exfat_load_bitmap(struct super_block *sb);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 410) void exfat_free_bitmap(struct exfat_sb_info *sbi);
23befe490ba88 (Hyeongseok Kim 2021-03-15 13:12:55 +0900 411) int exfat_set_bitmap(struct inode *inode, unsigned int clu, bool sync);
f728760aa923f (Hyeongseok Kim 2021-02-01 10:02:46 +0900 412) void exfat_clear_bitmap(struct inode *inode, unsigned int clu, bool sync);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 413) unsigned int exfat_find_free_bitmap(struct super_block *sb, unsigned int clu);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 414) int exfat_count_used_clusters(struct super_block *sb, unsigned int *ret_count);
654762df2ec7d (Hyeongseok Kim 2021-03-04 09:20:35 +0900 415) int exfat_trim_fs(struct inode *inode, struct fstrim_range *range);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 416)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 417) /* file.c */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 418) extern const struct file_operations exfat_file_operations;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 419) int __exfat_truncate(struct inode *inode, loff_t new_size);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 420) void exfat_truncate(struct inode *inode, loff_t size);
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 421) int exfat_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 422) struct iattr *attr);
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 423) int exfat_getattr(struct user_namespace *mnt_userns, const struct path *path,
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 424) struct kstat *stat, unsigned int request_mask,
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 425) unsigned int query_flags);
5267456e953fd (Sungjong Seo 2020-06-18 20:43:26 +0900 426) int exfat_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
654762df2ec7d (Hyeongseok Kim 2021-03-04 09:20:35 +0900 427) long exfat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
654762df2ec7d (Hyeongseok Kim 2021-03-04 09:20:35 +0900 428) long exfat_compat_ioctl(struct file *filp, unsigned int cmd,
654762df2ec7d (Hyeongseok Kim 2021-03-04 09:20:35 +0900 429) unsigned long arg);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 430)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 431) /* namei.c */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 432) extern const struct dentry_operations exfat_dentry_ops;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 433) extern const struct dentry_operations exfat_utf8_dentry_ops;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 434)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 435) /* cache.c */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 436) int exfat_cache_init(void);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 437) void exfat_cache_shutdown(void);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 438) void exfat_cache_inval_inode(struct inode *inode);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 439) int exfat_get_cluster(struct inode *inode, unsigned int cluster,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 440) unsigned int *fclus, unsigned int *dclus,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 441) unsigned int *last_dclus, int allow_eof);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 442)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 443) /* dir.c */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 444) extern const struct inode_operations exfat_dir_inode_operations;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 445) extern const struct file_operations exfat_dir_operations;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 446) unsigned int exfat_get_entry_type(struct exfat_dentry *p_entry);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 447) int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 448) int entry, unsigned int type, unsigned int start_clu,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 449) unsigned long long size);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 450) int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 451) int entry, int num_entries, struct exfat_uni_name *p_uniname);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 452) int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 453) int entry, int order, int num_entries);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 454) int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 455) int entry);
943af1fdacfeb (Tetsuhiro Kohada 2020-05-20 16:56:41 +0900 456) void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 457) int exfat_calc_num_entries(struct exfat_uni_name *p_uniname);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 458) int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 459) struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname,
c6e2f52e3051e (Hyeongseok Kim 2021-03-22 12:53:36 +0900 460) int num_entries, unsigned int type, struct exfat_hint *hint_opt);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 461) int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 462) int exfat_find_location(struct super_block *sb, struct exfat_chain *p_dir,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 463) int entry, sector_t *sector, int *offset);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 464) struct exfat_dentry *exfat_get_dentry(struct super_block *sb,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 465) struct exfat_chain *p_dir, int entry, struct buffer_head **bh,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 466) sector_t *sector);
943af1fdacfeb (Tetsuhiro Kohada 2020-05-20 16:56:41 +0900 467) struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es,
943af1fdacfeb (Tetsuhiro Kohada 2020-05-20 16:56:41 +0900 468) int num);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 469) struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
943af1fdacfeb (Tetsuhiro Kohada 2020-05-20 16:56:41 +0900 470) struct exfat_chain *p_dir, int entry, unsigned int type);
8b0c471773819 (Tetsuhiro Kohada 2020-06-24 09:54:54 +0900 471) int exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 472) int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 473)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 474) /* inode.c */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 475) extern const struct inode_operations exfat_file_inode_operations;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 476) void exfat_sync_inode(struct inode *inode);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 477) struct inode *exfat_build_inode(struct super_block *sb,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 478) struct exfat_dir_entry *info, loff_t i_pos);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 479) void exfat_hash_inode(struct inode *inode, loff_t i_pos);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 480) void exfat_unhash_inode(struct inode *inode);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 481) struct inode *exfat_iget(struct super_block *sb, loff_t i_pos);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 482) int exfat_write_inode(struct inode *inode, struct writeback_control *wbc);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 483) void exfat_evict_inode(struct inode *inode);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 484) int exfat_block_truncate_page(struct inode *inode, loff_t from);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 485)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 486) /* exfat/nls.c */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 487) unsigned short exfat_toupper(struct super_block *sb, unsigned short a);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 488) int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 489) unsigned short *b, unsigned int len);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 490) int exfat_utf16_to_nls(struct super_block *sb,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 491) struct exfat_uni_name *uniname, unsigned char *p_cstring,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 492) int len);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 493) int exfat_nls_to_utf16(struct super_block *sb,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 494) const unsigned char *p_cstring, const int len,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 495) struct exfat_uni_name *uniname, int *p_lossy);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 496) int exfat_create_upcase_table(struct super_block *sb);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 497) void exfat_free_upcase_table(struct exfat_sb_info *sbi);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 498)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 499) /* exfat/misc.c */
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 500) void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 501) __printf(3, 4) __cold;
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 502) #define exfat_fs_error(sb, fmt, args...) \
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 503) __exfat_fs_error(sb, 1, fmt, ## args)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 504) #define exfat_fs_error_ratelimit(sb, fmt, args...) \
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 505) __exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 506) fmt, ## args)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 507) void exfat_msg(struct super_block *sb, const char *lv, const char *fmt, ...)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 508) __printf(3, 4) __cold;
d1727d55c0327 (Joe Perches 2020-04-24 13:31:12 +0900 509) #define exfat_err(sb, fmt, ...) \
d1727d55c0327 (Joe Perches 2020-04-24 13:31:12 +0900 510) exfat_msg(sb, KERN_ERR, fmt, ##__VA_ARGS__)
d1727d55c0327 (Joe Perches 2020-04-24 13:31:12 +0900 511) #define exfat_warn(sb, fmt, ...) \
d1727d55c0327 (Joe Perches 2020-04-24 13:31:12 +0900 512) exfat_msg(sb, KERN_WARNING, fmt, ##__VA_ARGS__)
d1727d55c0327 (Joe Perches 2020-04-24 13:31:12 +0900 513) #define exfat_info(sb, fmt, ...) \
d1727d55c0327 (Joe Perches 2020-04-24 13:31:12 +0900 514) exfat_msg(sb, KERN_INFO, fmt, ##__VA_ARGS__)
d1727d55c0327 (Joe Perches 2020-04-24 13:31:12 +0900 515)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 516) void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
ed0f84d30ba65 (Tetsuhiro Kohada 2020-04-22 08:30:56 +0900 517) u8 tz, __le16 time, __le16 date, u8 time_cs);
81df1ad40644b (Eric Sandeen 2020-04-21 11:13:10 +0900 518) void exfat_truncate_atime(struct timespec64 *ts);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 519) void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,
ed0f84d30ba65 (Tetsuhiro Kohada 2020-04-22 08:30:56 +0900 520) u8 *tz, __le16 *time, __le16 *date, u8 *time_cs);
5875bf287d953 (Tetsuhiro Kohada 2020-05-29 19:14:59 +0900 521) u16 exfat_calc_chksum16(void *data, int len, u16 chksum, int type);
476189c0ef3b6 (Tetsuhiro Kohada 2020-05-31 18:30:17 +0900 522) u32 exfat_calc_chksum32(void *data, int len, u32 chksum, int type);
2c7f8937ef915 (Tetsuhiro Kohada 2020-06-16 11:18:07 +0900 523) void exfat_update_bh(struct buffer_head *bh, int sync);
3db3c3fb840ed (Tetsuhiro Kohada 2020-06-23 15:22:19 +0900 524) int exfat_update_bhs(struct buffer_head **bhs, int nr_bhs, int sync);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 525) void exfat_chain_set(struct exfat_chain *ec, unsigned int dir,
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 526) unsigned int size, unsigned char flags);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 527) void exfat_chain_dup(struct exfat_chain *dup, struct exfat_chain *ec);
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 528)
1acf1a564b603 (Namjae Jeon 2020-03-02 15:21:32 +0900 529) #endif /* !_EXFAT_FS_H */