fat: add extended fileds to struct fat_boot_sector

Later we will need "state" field to check if volume was cleanly unmounted.

Oleksij Rempel committed 13 years ago

Commit 6b464191 parent 899bed02 files · +32 −12Browse files

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@@ -120,14 +120,34 @@ struct fat_boot_sector { · 119 unmodified lines
120	__le32 hidden; /* hidden sectors (unused) */	120	__le32 hidden; /* hidden sectors (unused) */
121	__le32 total_sect; /* number of sectors (if sectors == 0) */	121	__le32 total_sect; /* number of sectors (if sectors == 0) */
122		122
123	/* The following fields are only used by FAT32 */	123	union {
124	__le32 fat32_length; /* sectors/FAT */	124	struct {
125	__le16 flags; /* bit 8: fat mirroring, low 4: active fat */	125	/* Extended BPB Fields for FAT16 */
126	__u8 version[2]; /* major, minor filesystem version */	126	__u8 drive_number; /* Physical drive number */
127	__le32 root_cluster; /* first cluster in root directory */	127	__u8 state; /* undocumented, but used
128	__le16 info_sector; /* filesystem info sector */	128	for mount state. */
129	__le16 backup_boot; /* backup boot sector */	129	/* other fiealds are not added here */
130	__le16 reserved2[6]; /* Unused */	130	} fat16;
		131
		132	struct {
		133	/* only used by FAT32 */
		134	__le32 length; /* sectors/FAT */
		135	__le16 flags; /* bit 8: fat mirroring,
		136	low 4: active fat */
		137	__u8 version[2]; /* major, minor filesystem
		138	version */
		139	__le32 root_cluster; /* first cluster in
		140	root directory */
		141	__le16 info_sector; /* filesystem info sector */
		142	__le16 backup_boot; /* backup boot sector */
		143	__le16 reserved2[6]; /* Unused */
		144	/* Extended BPB Fields for FAT32 */
		145	__u8 drive_number; /* Physical drive number */
		146	__u8 state; /* undocumented, but used
		147	for mount state. */
		148	/* other fiealds are not added here */
		149	} fat32;
		150	};
131	};	151	};
132		152
133	struct fat_boot_fsinfo {	153	struct fat_boot_fsinfo {