From 9e975dae2970d22557662761c8505ce9fd165684 Mon Sep 17 00:00:00 2001 From: OGAWA Hirofumi Date: Thu, 6 Nov 2008 12:53:46 -0800 Subject: [PATCH] fat: split include/msdos_fs.h This splits __KERNEL__ stuff in include/msdos_fs.h into fs/fat/fat.h. Signed-off-by: OGAWA Hirofumi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/fat/cache.c | 2 +- fs/fat/dir.c | 2 +- include/linux/msdos_fs.h => fs/fat/fat.h | 182 +-------- fs/fat/fatent.c | 1 + fs/fat/file.c | 2 +- fs/fat/inode.c | 2 +- fs/fat/misc.c | 2 +- fs/fat/namei_msdos.c | 2 +- fs/fat/namei_vfat.c | 3 +- include/linux/msdos_fs.h | 624 +++++++++---------------------- 10 files changed, 188 insertions(+), 634 deletions(-) copy include/linux/msdos_fs.h => fs/fat/fat.h (60%) rewrite include/linux/msdos_fs.h (60%) diff --git a/fs/fat/cache.c b/fs/fat/cache.c index 3222f51c41c..589edde9053 100644 --- a/fs/fat/cache.c +++ b/fs/fat/cache.c @@ -9,8 +9,8 @@ */ #include -#include #include +#include "fat.h" /* this must be > 0. */ #define FAT_MAX_CACHE 8 diff --git a/fs/fat/dir.c b/fs/fat/dir.c index bae1c329252..08b23ad25f1 100644 --- a/fs/fat/dir.c +++ b/fs/fat/dir.c @@ -16,11 +16,11 @@ #include #include #include -#include #include #include #include #include +#include "fat.h" static inline loff_t fat_make_i_pos(struct super_block *sb, struct buffer_head *bh, diff --git a/include/linux/msdos_fs.h b/fs/fat/fat.h similarity index 60% copy from include/linux/msdos_fs.h copy to fs/fat/fat.h index ba63858056c..51f1c42ca5e 100644 --- a/include/linux/msdos_fs.h +++ b/fs/fat/fat.h @@ -1,178 +1,12 @@ -#ifndef _LINUX_MSDOS_FS_H -#define _LINUX_MSDOS_FS_H - -#include -#include - -/* - * The MS-DOS filesystem constants/structures - */ - -#define SECTOR_SIZE 512 /* sector size (bytes) */ -#define SECTOR_BITS 9 /* log2(SECTOR_SIZE) */ -#define MSDOS_DPB (MSDOS_DPS) /* dir entries per block */ -#define MSDOS_DPB_BITS 4 /* log2(MSDOS_DPB) */ -#define MSDOS_DPS (SECTOR_SIZE / sizeof(struct msdos_dir_entry)) -#define MSDOS_DPS_BITS 4 /* log2(MSDOS_DPS) */ -#define CF_LE_W(v) le16_to_cpu(v) -#define CF_LE_L(v) le32_to_cpu(v) -#define CT_LE_W(v) cpu_to_le16(v) -#define CT_LE_L(v) cpu_to_le32(v) - - -#define MSDOS_ROOT_INO 1 /* == MINIX_ROOT_INO */ -#define MSDOS_DIR_BITS 5 /* log2(sizeof(struct msdos_dir_entry)) */ - -/* directory limit */ -#define FAT_MAX_DIR_ENTRIES (65536) -#define FAT_MAX_DIR_SIZE (FAT_MAX_DIR_ENTRIES << MSDOS_DIR_BITS) - -#define ATTR_NONE 0 /* no attribute bits */ -#define ATTR_RO 1 /* read-only */ -#define ATTR_HIDDEN 2 /* hidden */ -#define ATTR_SYS 4 /* system */ -#define ATTR_VOLUME 8 /* volume label */ -#define ATTR_DIR 16 /* directory */ -#define ATTR_ARCH 32 /* archived */ - -/* attribute bits that are copied "as is" */ -#define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN) -/* bits that are used by the Windows 95/Windows NT extended FAT */ -#define ATTR_EXT (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME) - -#define CASE_LOWER_BASE 8 /* base is lower case */ -#define CASE_LOWER_EXT 16 /* extension is lower case */ - -#define DELETED_FLAG 0xe5 /* marks file as deleted when in name[0] */ -#define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG) - -/* valid file mode bits */ -#define MSDOS_VALID_MODE (S_IFREG | S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO) -/* Convert attribute bits and a mask to the UNIX mode. */ -#define MSDOS_MKMODE(a, m) (m & (a & ATTR_RO ? S_IRUGO|S_IXUGO : S_IRWXUGO)) - -#define MSDOS_NAME 11 /* maximum name length */ -#define MSDOS_LONGNAME 256 /* maximum name length */ -#define MSDOS_SLOTS 21 /* max # of slots for short and long names */ -#define MSDOS_DOT ". " /* ".", padded to MSDOS_NAME chars */ -#define MSDOS_DOTDOT ".. " /* "..", padded to MSDOS_NAME chars */ - -#define FAT_FIRST_ENT(s, x) ((MSDOS_SB(s)->fat_bits == 32 ? 0x0FFFFF00 : \ - MSDOS_SB(s)->fat_bits == 16 ? 0xFF00 : 0xF00) | (x)) - -/* start of data cluster's entry (number of reserved clusters) */ -#define FAT_START_ENT 2 - -/* maximum number of clusters */ -#define MAX_FAT12 0xFF4 -#define MAX_FAT16 0xFFF4 -#define MAX_FAT32 0x0FFFFFF6 -#define MAX_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? MAX_FAT32 : \ - MSDOS_SB(s)->fat_bits == 16 ? MAX_FAT16 : MAX_FAT12) - -/* bad cluster mark */ -#define BAD_FAT12 0xFF7 -#define BAD_FAT16 0xFFF7 -#define BAD_FAT32 0x0FFFFFF7 - -/* standard EOF */ -#define EOF_FAT12 0xFFF -#define EOF_FAT16 0xFFFF -#define EOF_FAT32 0x0FFFFFFF - -#define FAT_ENT_FREE (0) -#define FAT_ENT_BAD (BAD_FAT32) -#define FAT_ENT_EOF (EOF_FAT32) - -#define FAT_FSINFO_SIG1 0x41615252 -#define FAT_FSINFO_SIG2 0x61417272 -#define IS_FSINFO(x) (le32_to_cpu((x)->signature1) == FAT_FSINFO_SIG1 \ - && le32_to_cpu((x)->signature2) == FAT_FSINFO_SIG2) - -struct __fat_dirent { - long d_ino; - __kernel_off_t d_off; - unsigned short d_reclen; - char d_name[256]; /* We must not include limits.h! */ -}; - -/* - * ioctl commands - */ -#define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct __fat_dirent[2]) -#define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct __fat_dirent[2]) -/* has used 0x72 ('r') in collision, so skip a few */ -#define FAT_IOCTL_GET_ATTRIBUTES _IOR('r', 0x10, __u32) -#define FAT_IOCTL_SET_ATTRIBUTES _IOW('r', 0x11, __u32) - -struct fat_boot_sector { - __u8 ignored[3]; /* Boot strap short or near jump */ - __u8 system_id[8]; /* Name - can be used to special case - partition manager volumes */ - __u8 sector_size[2]; /* bytes per logical sector */ - __u8 sec_per_clus; /* sectors/cluster */ - __le16 reserved; /* reserved sectors */ - __u8 fats; /* number of FATs */ - __u8 dir_entries[2]; /* root directory entries */ - __u8 sectors[2]; /* number of sectors */ - __u8 media; /* media code */ - __le16 fat_length; /* sectors/FAT */ - __le16 secs_track; /* sectors per track */ - __le16 heads; /* number of heads */ - __le32 hidden; /* hidden sectors (unused) */ - __le32 total_sect; /* number of sectors (if sectors == 0) */ - - /* The following fields are only used by FAT32 */ - __le32 fat32_length; /* sectors/FAT */ - __le16 flags; /* bit 8: fat mirroring, low 4: active fat */ - __u8 version[2]; /* major, minor filesystem version */ - __le32 root_cluster; /* first cluster in root directory */ - __le16 info_sector; /* filesystem info sector */ - __le16 backup_boot; /* backup boot sector */ - __le16 reserved2[6]; /* Unused */ -}; - -struct fat_boot_fsinfo { - __le32 signature1; /* 0x41615252L */ - __le32 reserved1[120]; /* Nothing as far as I can tell */ - __le32 signature2; /* 0x61417272L */ - __le32 free_clusters; /* Free cluster count. -1 if unknown */ - __le32 next_cluster; /* Most recently allocated cluster */ - __le32 reserved2[4]; -}; - -struct msdos_dir_entry { - __u8 name[MSDOS_NAME];/* name and extension */ - __u8 attr; /* attribute bits */ - __u8 lcase; /* Case for base and extension */ - __u8 ctime_cs; /* Creation time, centiseconds (0-199) */ - __le16 ctime; /* Creation time */ - __le16 cdate; /* Creation date */ - __le16 adate; /* Last access date */ - __le16 starthi; /* High 16 bits of cluster in FAT32 */ - __le16 time,date,start;/* time, date and first cluster */ - __le32 size; /* file size (in bytes) */ -}; - -/* Up to 13 characters of the name */ -struct msdos_dir_slot { - __u8 id; /* sequence number for slot */ - __u8 name0_4[10]; /* first 5 characters in name */ - __u8 attr; /* attribute byte */ - __u8 reserved; /* always 0 */ - __u8 alias_checksum; /* checksum for 8.3 alias */ - __u8 name5_10[12]; /* 6 more characters in name */ - __le16 start; /* starting cluster number, 0 in long slots */ - __u8 name11_12[4]; /* last 2 characters in name */ -}; - -#ifdef __KERNEL__ +#ifndef _FAT_H +#define _FAT_H #include #include #include #include #include +#include /* * vfat shortname flags @@ -335,12 +169,6 @@ static inline void fatwchar_to16(__u8 *dst, const wchar_t *src, size_t len) #endif } -/* media of boot sector */ -static inline int fat_valid_media(u8 media) -{ - return 0xf8 <= media || media == 0xf0; -} - /* fat/cache.c */ extern void fat_cache_inval_inode(struct inode *inode); extern int fat_get_cluster(struct inode *inode, int cluster, @@ -443,6 +271,4 @@ extern int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs); int fat_cache_init(void); void fat_cache_destroy(void); -#endif /* __KERNEL__ */ - -#endif +#endif /* !_FAT_H */ diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c index fb98b3d847e..5b5f49061b7 100644 --- a/fs/fat/fatent.c +++ b/fs/fat/fatent.c @@ -7,6 +7,7 @@ #include #include #include +#include "fat.h" struct fatent_operations { void (*ent_blocknr)(struct super_block *, int, int *, sector_t *); diff --git a/fs/fat/file.c b/fs/fat/file.c index ddde37025ca..b21973f266a 100644 --- a/fs/fat/file.c +++ b/fs/fat/file.c @@ -10,13 +10,13 @@ #include #include #include -#include #include #include #include #include #include #include +#include "fat.h" int fat_generic_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) diff --git a/fs/fat/inode.c b/fs/fat/inode.c index 2b2eec1283b..3921de2013a 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -16,7 +16,6 @@ #include #include #include -#include #include #include #include @@ -28,6 +27,7 @@ #include #include #include +#include "fat.h" #ifndef CONFIG_FAT_DEFAULT_IOCHARSET /* if user don't select VFAT, this is undefined. */ diff --git a/fs/fat/misc.c b/fs/fat/misc.c index 79fb98ad36d..91ad9be18ff 100644 --- a/fs/fat/misc.c +++ b/fs/fat/misc.c @@ -8,8 +8,8 @@ #include #include -#include #include +#include "fat.h" /* * fat_fs_panic reports a severe file system problem and sets the file system diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c index e844b9809d2..c0a4d5cd99b 100644 --- a/fs/fat/namei_msdos.c +++ b/fs/fat/namei_msdos.c @@ -9,8 +9,8 @@ #include #include #include -#include #include +#include "fat.h" /* Characters that are undesirable in an MS-DOS file name */ static unsigned char bad_chars[] = "*?<>|\""; diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index 155c10b4adb..facf3bf0211 100644 --- a/fs/fat/namei_vfat.c +++ b/fs/fat/namei_vfat.c @@ -16,14 +16,13 @@ */ #include - #include -#include #include #include #include #include #include +#include "fat.h" static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd) { diff --git a/include/linux/msdos_fs.h b/include/linux/msdos_fs.h dissimilarity index 60% index ba63858056c..0982fb47a90 100644 --- a/include/linux/msdos_fs.h +++ b/include/linux/msdos_fs.h @@ -1,448 +1,176 @@ -#ifndef _LINUX_MSDOS_FS_H -#define _LINUX_MSDOS_FS_H - -#include -#include - -/* - * The MS-DOS filesystem constants/structures - */ - -#define SECTOR_SIZE 512 /* sector size (bytes) */ -#define SECTOR_BITS 9 /* log2(SECTOR_SIZE) */ -#define MSDOS_DPB (MSDOS_DPS) /* dir entries per block */ -#define MSDOS_DPB_BITS 4 /* log2(MSDOS_DPB) */ -#define MSDOS_DPS (SECTOR_SIZE / sizeof(struct msdos_dir_entry)) -#define MSDOS_DPS_BITS 4 /* log2(MSDOS_DPS) */ -#define CF_LE_W(v) le16_to_cpu(v) -#define CF_LE_L(v) le32_to_cpu(v) -#define CT_LE_W(v) cpu_to_le16(v) -#define CT_LE_L(v) cpu_to_le32(v) - - -#define MSDOS_ROOT_INO 1 /* == MINIX_ROOT_INO */ -#define MSDOS_DIR_BITS 5 /* log2(sizeof(struct msdos_dir_entry)) */ - -/* directory limit */ -#define FAT_MAX_DIR_ENTRIES (65536) -#define FAT_MAX_DIR_SIZE (FAT_MAX_DIR_ENTRIES << MSDOS_DIR_BITS) - -#define ATTR_NONE 0 /* no attribute bits */ -#define ATTR_RO 1 /* read-only */ -#define ATTR_HIDDEN 2 /* hidden */ -#define ATTR_SYS 4 /* system */ -#define ATTR_VOLUME 8 /* volume label */ -#define ATTR_DIR 16 /* directory */ -#define ATTR_ARCH 32 /* archived */ - -/* attribute bits that are copied "as is" */ -#define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN) -/* bits that are used by the Windows 95/Windows NT extended FAT */ -#define ATTR_EXT (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME) - -#define CASE_LOWER_BASE 8 /* base is lower case */ -#define CASE_LOWER_EXT 16 /* extension is lower case */ - -#define DELETED_FLAG 0xe5 /* marks file as deleted when in name[0] */ -#define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG) - -/* valid file mode bits */ -#define MSDOS_VALID_MODE (S_IFREG | S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO) -/* Convert attribute bits and a mask to the UNIX mode. */ -#define MSDOS_MKMODE(a, m) (m & (a & ATTR_RO ? S_IRUGO|S_IXUGO : S_IRWXUGO)) - -#define MSDOS_NAME 11 /* maximum name length */ -#define MSDOS_LONGNAME 256 /* maximum name length */ -#define MSDOS_SLOTS 21 /* max # of slots for short and long names */ -#define MSDOS_DOT ". " /* ".", padded to MSDOS_NAME chars */ -#define MSDOS_DOTDOT ".. " /* "..", padded to MSDOS_NAME chars */ - -#define FAT_FIRST_ENT(s, x) ((MSDOS_SB(s)->fat_bits == 32 ? 0x0FFFFF00 : \ - MSDOS_SB(s)->fat_bits == 16 ? 0xFF00 : 0xF00) | (x)) - -/* start of data cluster's entry (number of reserved clusters) */ -#define FAT_START_ENT 2 - -/* maximum number of clusters */ -#define MAX_FAT12 0xFF4 -#define MAX_FAT16 0xFFF4 -#define MAX_FAT32 0x0FFFFFF6 -#define MAX_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? MAX_FAT32 : \ - MSDOS_SB(s)->fat_bits == 16 ? MAX_FAT16 : MAX_FAT12) - -/* bad cluster mark */ -#define BAD_FAT12 0xFF7 -#define BAD_FAT16 0xFFF7 -#define BAD_FAT32 0x0FFFFFF7 - -/* standard EOF */ -#define EOF_FAT12 0xFFF -#define EOF_FAT16 0xFFFF -#define EOF_FAT32 0x0FFFFFFF - -#define FAT_ENT_FREE (0) -#define FAT_ENT_BAD (BAD_FAT32) -#define FAT_ENT_EOF (EOF_FAT32) - -#define FAT_FSINFO_SIG1 0x41615252 -#define FAT_FSINFO_SIG2 0x61417272 -#define IS_FSINFO(x) (le32_to_cpu((x)->signature1) == FAT_FSINFO_SIG1 \ - && le32_to_cpu((x)->signature2) == FAT_FSINFO_SIG2) - -struct __fat_dirent { - long d_ino; - __kernel_off_t d_off; - unsigned short d_reclen; - char d_name[256]; /* We must not include limits.h! */ -}; - -/* - * ioctl commands - */ -#define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct __fat_dirent[2]) -#define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct __fat_dirent[2]) -/* has used 0x72 ('r') in collision, so skip a few */ -#define FAT_IOCTL_GET_ATTRIBUTES _IOR('r', 0x10, __u32) -#define FAT_IOCTL_SET_ATTRIBUTES _IOW('r', 0x11, __u32) - -struct fat_boot_sector { - __u8 ignored[3]; /* Boot strap short or near jump */ - __u8 system_id[8]; /* Name - can be used to special case - partition manager volumes */ - __u8 sector_size[2]; /* bytes per logical sector */ - __u8 sec_per_clus; /* sectors/cluster */ - __le16 reserved; /* reserved sectors */ - __u8 fats; /* number of FATs */ - __u8 dir_entries[2]; /* root directory entries */ - __u8 sectors[2]; /* number of sectors */ - __u8 media; /* media code */ - __le16 fat_length; /* sectors/FAT */ - __le16 secs_track; /* sectors per track */ - __le16 heads; /* number of heads */ - __le32 hidden; /* hidden sectors (unused) */ - __le32 total_sect; /* number of sectors (if sectors == 0) */ - - /* The following fields are only used by FAT32 */ - __le32 fat32_length; /* sectors/FAT */ - __le16 flags; /* bit 8: fat mirroring, low 4: active fat */ - __u8 version[2]; /* major, minor filesystem version */ - __le32 root_cluster; /* first cluster in root directory */ - __le16 info_sector; /* filesystem info sector */ - __le16 backup_boot; /* backup boot sector */ - __le16 reserved2[6]; /* Unused */ -}; - -struct fat_boot_fsinfo { - __le32 signature1; /* 0x41615252L */ - __le32 reserved1[120]; /* Nothing as far as I can tell */ - __le32 signature2; /* 0x61417272L */ - __le32 free_clusters; /* Free cluster count. -1 if unknown */ - __le32 next_cluster; /* Most recently allocated cluster */ - __le32 reserved2[4]; -}; - -struct msdos_dir_entry { - __u8 name[MSDOS_NAME];/* name and extension */ - __u8 attr; /* attribute bits */ - __u8 lcase; /* Case for base and extension */ - __u8 ctime_cs; /* Creation time, centiseconds (0-199) */ - __le16 ctime; /* Creation time */ - __le16 cdate; /* Creation date */ - __le16 adate; /* Last access date */ - __le16 starthi; /* High 16 bits of cluster in FAT32 */ - __le16 time,date,start;/* time, date and first cluster */ - __le32 size; /* file size (in bytes) */ -}; - -/* Up to 13 characters of the name */ -struct msdos_dir_slot { - __u8 id; /* sequence number for slot */ - __u8 name0_4[10]; /* first 5 characters in name */ - __u8 attr; /* attribute byte */ - __u8 reserved; /* always 0 */ - __u8 alias_checksum; /* checksum for 8.3 alias */ - __u8 name5_10[12]; /* 6 more characters in name */ - __le16 start; /* starting cluster number, 0 in long slots */ - __u8 name11_12[4]; /* last 2 characters in name */ -}; - -#ifdef __KERNEL__ - -#include -#include -#include -#include -#include - -/* - * vfat shortname flags - */ -#define VFAT_SFN_DISPLAY_LOWER 0x0001 /* convert to lowercase for display */ -#define VFAT_SFN_DISPLAY_WIN95 0x0002 /* emulate win95 rule for display */ -#define VFAT_SFN_DISPLAY_WINNT 0x0004 /* emulate winnt rule for display */ -#define VFAT_SFN_CREATE_WIN95 0x0100 /* emulate win95 rule for create */ -#define VFAT_SFN_CREATE_WINNT 0x0200 /* emulate winnt rule for create */ - -struct fat_mount_options { - uid_t fs_uid; - gid_t fs_gid; - unsigned short fs_fmask; - unsigned short fs_dmask; - unsigned short codepage; /* Codepage for shortname conversions */ - char *iocharset; /* Charset used for filename input/display */ - unsigned short shortname; /* flags for shortname display/create rule */ - unsigned char name_check; /* r = relaxed, n = normal, s = strict */ - unsigned short allow_utime;/* permission for setting the [am]time */ - unsigned quiet:1, /* set = fake successful chmods and chowns */ - showexec:1, /* set = only set x bit for com/exe/bat */ - sys_immutable:1, /* set = system files are immutable */ - dotsOK:1, /* set = hidden and system files are named '.filename' */ - isvfat:1, /* 0=no vfat long filename support, 1=vfat support */ - utf8:1, /* Use of UTF-8 character set (Default) */ - unicode_xlate:1, /* create escape sequences for unhandled Unicode */ - numtail:1, /* Does first alias have a numeric '~1' type tail? */ - flush:1, /* write things quickly */ - nocase:1, /* Does this need case conversion? 0=need case conversion*/ - usefree:1, /* Use free_clusters for FAT32 */ - tz_utc:1; /* Filesystem timestamps are in UTC */ -}; - -#define FAT_HASH_BITS 8 -#define FAT_HASH_SIZE (1UL << FAT_HASH_BITS) -#define FAT_HASH_MASK (FAT_HASH_SIZE-1) - -/* - * MS-DOS file system in-core superblock data - */ -struct msdos_sb_info { - unsigned short sec_per_clus; /* sectors/cluster */ - unsigned short cluster_bits; /* log2(cluster_size) */ - unsigned int cluster_size; /* cluster size */ - unsigned char fats,fat_bits; /* number of FATs, FAT bits (12 or 16) */ - unsigned short fat_start; - unsigned long fat_length; /* FAT start & length (sec.) */ - unsigned long dir_start; - unsigned short dir_entries; /* root dir start & entries */ - unsigned long data_start; /* first data sector */ - unsigned long max_cluster; /* maximum cluster number */ - unsigned long root_cluster; /* first cluster of the root directory */ - unsigned long fsinfo_sector; /* sector number of FAT32 fsinfo */ - struct mutex fat_lock; - unsigned int prev_free; /* previously allocated cluster number */ - unsigned int free_clusters; /* -1 if undefined */ - unsigned int free_clus_valid; /* is free_clusters valid? */ - struct fat_mount_options options; - struct nls_table *nls_disk; /* Codepage used on disk */ - struct nls_table *nls_io; /* Charset used for input and display */ - const void *dir_ops; /* Opaque; default directory operations */ - int dir_per_block; /* dir entries per block */ - int dir_per_block_bits; /* log2(dir_per_block) */ - - int fatent_shift; - struct fatent_operations *fatent_ops; - - spinlock_t inode_hash_lock; - struct hlist_head inode_hashtable[FAT_HASH_SIZE]; -}; - -#define FAT_CACHE_VALID 0 /* special case for valid cache */ - -/* - * MS-DOS file system inode data in memory - */ -struct msdos_inode_info { - spinlock_t cache_lru_lock; - struct list_head cache_lru; - int nr_caches; - /* for avoiding the race between fat_free() and fat_get_cluster() */ - unsigned int cache_valid_id; - - loff_t mmu_private; - int i_start; /* first cluster or 0 */ - int i_logstart; /* logical first cluster */ - int i_attrs; /* unused attribute bits */ - loff_t i_pos; /* on-disk position of directory entry or 0 */ - struct hlist_node i_fat_hash; /* hash by i_location */ - struct inode vfs_inode; -}; - -struct fat_slot_info { - loff_t i_pos; /* on-disk position of directory entry */ - loff_t slot_off; /* offset for slot or de start */ - int nr_slots; /* number of slots + 1(de) in filename */ - struct msdos_dir_entry *de; - struct buffer_head *bh; -}; - -static inline struct msdos_sb_info *MSDOS_SB(struct super_block *sb) -{ - return sb->s_fs_info; -} - -static inline struct msdos_inode_info *MSDOS_I(struct inode *inode) -{ - return container_of(inode, struct msdos_inode_info, vfs_inode); -} - -/* Return the FAT attribute byte for this inode */ -static inline u8 fat_attr(struct inode *inode) -{ - return ((inode->i_mode & S_IWUGO) ? ATTR_NONE : ATTR_RO) | - (S_ISDIR(inode->i_mode) ? ATTR_DIR : ATTR_NONE) | - MSDOS_I(inode)->i_attrs; -} - -static inline unsigned char fat_checksum(const __u8 *name) -{ - unsigned char s = name[0]; - s = (s<<7) + (s>>1) + name[1]; s = (s<<7) + (s>>1) + name[2]; - s = (s<<7) + (s>>1) + name[3]; s = (s<<7) + (s>>1) + name[4]; - s = (s<<7) + (s>>1) + name[5]; s = (s<<7) + (s>>1) + name[6]; - s = (s<<7) + (s>>1) + name[7]; s = (s<<7) + (s>>1) + name[8]; - s = (s<<7) + (s>>1) + name[9]; s = (s<<7) + (s>>1) + name[10]; - return s; -} - -static inline sector_t fat_clus_to_blknr(struct msdos_sb_info *sbi, int clus) -{ - return ((sector_t)clus - FAT_START_ENT) * sbi->sec_per_clus - + sbi->data_start; -} - -static inline void fat16_towchar(wchar_t *dst, const __u8 *src, size_t len) -{ -#ifdef __BIG_ENDIAN - while (len--) { - *dst++ = src[0] | (src[1] << 8); - src += 2; - } -#else - memcpy(dst, src, len * 2); -#endif -} - -static inline void fatwchar_to16(__u8 *dst, const wchar_t *src, size_t len) -{ -#ifdef __BIG_ENDIAN - while (len--) { - dst[0] = *src & 0x00FF; - dst[1] = (*src & 0xFF00) >> 8; - dst += 2; - src++; - } -#else - memcpy(dst, src, len * 2); -#endif -} - -/* media of boot sector */ -static inline int fat_valid_media(u8 media) -{ - return 0xf8 <= media || media == 0xf0; -} - -/* fat/cache.c */ -extern void fat_cache_inval_inode(struct inode *inode); -extern int fat_get_cluster(struct inode *inode, int cluster, - int *fclus, int *dclus); -extern int fat_bmap(struct inode *inode, sector_t sector, sector_t *phys, - unsigned long *mapped_blocks); - -/* fat/dir.c */ -extern const struct file_operations fat_dir_operations; -extern int fat_search_long(struct inode *inode, const unsigned char *name, - int name_len, struct fat_slot_info *sinfo); -extern int fat_dir_empty(struct inode *dir); -extern int fat_subdirs(struct inode *dir); -extern int fat_scan(struct inode *dir, const unsigned char *name, - struct fat_slot_info *sinfo); -extern int fat_get_dotdot_entry(struct inode *dir, struct buffer_head **bh, - struct msdos_dir_entry **de, loff_t *i_pos); -extern int fat_alloc_new_dir(struct inode *dir, struct timespec *ts); -extern int fat_add_entries(struct inode *dir, void *slots, int nr_slots, - struct fat_slot_info *sinfo); -extern int fat_remove_entries(struct inode *dir, struct fat_slot_info *sinfo); - -/* fat/fatent.c */ -struct fat_entry { - int entry; - union { - u8 *ent12_p[2]; - __le16 *ent16_p; - __le32 *ent32_p; - } u; - int nr_bhs; - struct buffer_head *bhs[2]; -}; - -static inline void fatent_init(struct fat_entry *fatent) -{ - fatent->nr_bhs = 0; - fatent->entry = 0; - fatent->u.ent32_p = NULL; - fatent->bhs[0] = fatent->bhs[1] = NULL; -} - -static inline void fatent_set_entry(struct fat_entry *fatent, int entry) -{ - fatent->entry = entry; - fatent->u.ent32_p = NULL; -} - -static inline void fatent_brelse(struct fat_entry *fatent) -{ - int i; - fatent->u.ent32_p = NULL; - for (i = 0; i < fatent->nr_bhs; i++) - brelse(fatent->bhs[i]); - fatent->nr_bhs = 0; - fatent->bhs[0] = fatent->bhs[1] = NULL; -} - -extern void fat_ent_access_init(struct super_block *sb); -extern int fat_ent_read(struct inode *inode, struct fat_entry *fatent, - int entry); -extern int fat_ent_write(struct inode *inode, struct fat_entry *fatent, - int new, int wait); -extern int fat_alloc_clusters(struct inode *inode, int *cluster, - int nr_cluster); -extern int fat_free_clusters(struct inode *inode, int cluster); -extern int fat_count_free_clusters(struct super_block *sb); - -/* fat/file.c */ -extern int fat_generic_ioctl(struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg); -extern const struct file_operations fat_file_operations; -extern const struct inode_operations fat_file_inode_operations; -extern int fat_setattr(struct dentry * dentry, struct iattr * attr); -extern void fat_truncate(struct inode *inode); -extern int fat_getattr(struct vfsmount *mnt, struct dentry *dentry, - struct kstat *stat); - -/* fat/inode.c */ -extern void fat_attach(struct inode *inode, loff_t i_pos); -extern void fat_detach(struct inode *inode); -extern struct inode *fat_iget(struct super_block *sb, loff_t i_pos); -extern struct inode *fat_build_inode(struct super_block *sb, - struct msdos_dir_entry *de, loff_t i_pos); -extern int fat_sync_inode(struct inode *inode); -extern int fat_fill_super(struct super_block *sb, void *data, int silent, - const struct inode_operations *fs_dir_inode_ops, int isvfat); - -extern int fat_flush_inodes(struct super_block *sb, struct inode *i1, - struct inode *i2); -/* fat/misc.c */ -extern void fat_fs_panic(struct super_block *s, const char *fmt, ...); -extern void fat_clusters_flush(struct super_block *sb); -extern int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster); -extern int date_dos2unix(unsigned short time, unsigned short date, int tz_utc); -extern void fat_date_unix2dos(int unix_date, __le16 *time, __le16 *date, - int tz_utc); -extern int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs); - -int fat_cache_init(void); -void fat_cache_destroy(void); - -#endif /* __KERNEL__ */ - -#endif +#ifndef _LINUX_MSDOS_FS_H +#define _LINUX_MSDOS_FS_H + +#include +#include + +/* + * The MS-DOS filesystem constants/structures + */ + +#define SECTOR_SIZE 512 /* sector size (bytes) */ +#define SECTOR_BITS 9 /* log2(SECTOR_SIZE) */ +#define MSDOS_DPB (MSDOS_DPS) /* dir entries per block */ +#define MSDOS_DPB_BITS 4 /* log2(MSDOS_DPB) */ +#define MSDOS_DPS (SECTOR_SIZE / sizeof(struct msdos_dir_entry)) +#define MSDOS_DPS_BITS 4 /* log2(MSDOS_DPS) */ +#define CF_LE_W(v) le16_to_cpu(v) +#define CF_LE_L(v) le32_to_cpu(v) +#define CT_LE_W(v) cpu_to_le16(v) +#define CT_LE_L(v) cpu_to_le32(v) + + +#define MSDOS_ROOT_INO 1 /* == MINIX_ROOT_INO */ +#define MSDOS_DIR_BITS 5 /* log2(sizeof(struct msdos_dir_entry)) */ + +/* directory limit */ +#define FAT_MAX_DIR_ENTRIES (65536) +#define FAT_MAX_DIR_SIZE (FAT_MAX_DIR_ENTRIES << MSDOS_DIR_BITS) + +#define ATTR_NONE 0 /* no attribute bits */ +#define ATTR_RO 1 /* read-only */ +#define ATTR_HIDDEN 2 /* hidden */ +#define ATTR_SYS 4 /* system */ +#define ATTR_VOLUME 8 /* volume label */ +#define ATTR_DIR 16 /* directory */ +#define ATTR_ARCH 32 /* archived */ + +/* attribute bits that are copied "as is" */ +#define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN) +/* bits that are used by the Windows 95/Windows NT extended FAT */ +#define ATTR_EXT (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME) + +#define CASE_LOWER_BASE 8 /* base is lower case */ +#define CASE_LOWER_EXT 16 /* extension is lower case */ + +#define DELETED_FLAG 0xe5 /* marks file as deleted when in name[0] */ +#define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG) + +/* valid file mode bits */ +#define MSDOS_VALID_MODE (S_IFREG | S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO) +/* Convert attribute bits and a mask to the UNIX mode. */ +#define MSDOS_MKMODE(a, m) (m & (a & ATTR_RO ? S_IRUGO|S_IXUGO : S_IRWXUGO)) + +#define MSDOS_NAME 11 /* maximum name length */ +#define MSDOS_LONGNAME 256 /* maximum name length */ +#define MSDOS_SLOTS 21 /* max # of slots for short and long names */ +#define MSDOS_DOT ". " /* ".", padded to MSDOS_NAME chars */ +#define MSDOS_DOTDOT ".. " /* "..", padded to MSDOS_NAME chars */ + +#define FAT_FIRST_ENT(s, x) ((MSDOS_SB(s)->fat_bits == 32 ? 0x0FFFFF00 : \ + MSDOS_SB(s)->fat_bits == 16 ? 0xFF00 : 0xF00) | (x)) + +/* start of data cluster's entry (number of reserved clusters) */ +#define FAT_START_ENT 2 + +/* maximum number of clusters */ +#define MAX_FAT12 0xFF4 +#define MAX_FAT16 0xFFF4 +#define MAX_FAT32 0x0FFFFFF6 +#define MAX_FAT(s) (MSDOS_SB(s)->fat_bits == 32 ? MAX_FAT32 : \ + MSDOS_SB(s)->fat_bits == 16 ? MAX_FAT16 : MAX_FAT12) + +/* bad cluster mark */ +#define BAD_FAT12 0xFF7 +#define BAD_FAT16 0xFFF7 +#define BAD_FAT32 0x0FFFFFF7 + +/* standard EOF */ +#define EOF_FAT12 0xFFF +#define EOF_FAT16 0xFFFF +#define EOF_FAT32 0x0FFFFFFF + +#define FAT_ENT_FREE (0) +#define FAT_ENT_BAD (BAD_FAT32) +#define FAT_ENT_EOF (EOF_FAT32) + +#define FAT_FSINFO_SIG1 0x41615252 +#define FAT_FSINFO_SIG2 0x61417272 +#define IS_FSINFO(x) (le32_to_cpu((x)->signature1) == FAT_FSINFO_SIG1 \ + && le32_to_cpu((x)->signature2) == FAT_FSINFO_SIG2) + +struct __fat_dirent { + long d_ino; + __kernel_off_t d_off; + unsigned short d_reclen; + char d_name[256]; /* We must not include limits.h! */ +}; + +/* + * ioctl commands + */ +#define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct __fat_dirent[2]) +#define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct __fat_dirent[2]) +/* has used 0x72 ('r') in collision, so skip a few */ +#define FAT_IOCTL_GET_ATTRIBUTES _IOR('r', 0x10, __u32) +#define FAT_IOCTL_SET_ATTRIBUTES _IOW('r', 0x11, __u32) + +struct fat_boot_sector { + __u8 ignored[3]; /* Boot strap short or near jump */ + __u8 system_id[8]; /* Name - can be used to special case + partition manager volumes */ + __u8 sector_size[2]; /* bytes per logical sector */ + __u8 sec_per_clus; /* sectors/cluster */ + __le16 reserved; /* reserved sectors */ + __u8 fats; /* number of FATs */ + __u8 dir_entries[2]; /* root directory entries */ + __u8 sectors[2]; /* number of sectors */ + __u8 media; /* media code */ + __le16 fat_length; /* sectors/FAT */ + __le16 secs_track; /* sectors per track */ + __le16 heads; /* number of heads */ + __le32 hidden; /* hidden sectors (unused) */ + __le32 total_sect; /* number of sectors (if sectors == 0) */ + + /* The following fields are only used by FAT32 */ + __le32 fat32_length; /* sectors/FAT */ + __le16 flags; /* bit 8: fat mirroring, low 4: active fat */ + __u8 version[2]; /* major, minor filesystem version */ + __le32 root_cluster; /* first cluster in root directory */ + __le16 info_sector; /* filesystem info sector */ + __le16 backup_boot; /* backup boot sector */ + __le16 reserved2[6]; /* Unused */ +}; + +struct fat_boot_fsinfo { + __le32 signature1; /* 0x41615252L */ + __le32 reserved1[120]; /* Nothing as far as I can tell */ + __le32 signature2; /* 0x61417272L */ + __le32 free_clusters; /* Free cluster count. -1 if unknown */ + __le32 next_cluster; /* Most recently allocated cluster */ + __le32 reserved2[4]; +}; + +struct msdos_dir_entry { + __u8 name[MSDOS_NAME];/* name and extension */ + __u8 attr; /* attribute bits */ + __u8 lcase; /* Case for base and extension */ + __u8 ctime_cs; /* Creation time, centiseconds (0-199) */ + __le16 ctime; /* Creation time */ + __le16 cdate; /* Creation date */ + __le16 adate; /* Last access date */ + __le16 starthi; /* High 16 bits of cluster in FAT32 */ + __le16 time,date,start;/* time, date and first cluster */ + __le32 size; /* file size (in bytes) */ +}; + +/* Up to 13 characters of the name */ +struct msdos_dir_slot { + __u8 id; /* sequence number for slot */ + __u8 name0_4[10]; /* first 5 characters in name */ + __u8 attr; /* attribute byte */ + __u8 reserved; /* always 0 */ + __u8 alias_checksum; /* checksum for 8.3 alias */ + __u8 name5_10[12]; /* 6 more characters in name */ + __le16 start; /* starting cluster number, 0 in long slots */ + __u8 name11_12[4]; /* last 2 characters in name */ +}; + +#ifdef __KERNEL__ +/* media of boot sector */ +static inline int fat_valid_media(u8 media) +{ + return 0xf8 <= media || media == 0xf0; +} +#endif /* !__KERNEL__ */ +#endif /* !_LINUX_MSDOS_FS_H */ -- 2.11.4.GIT