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FAT: Add new ioctl VFAT_IOCTL_GET_VOLUME_ID for reading the volume ID.

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Signed-off-by: Brian Swetland <swetland@google.com>
This commit is contained in:
Mike Lockwood
2008-03-15 13:29:36 -04:00
committed by Colin Cross
parent 807e5f6486
commit ac7333371d
4 changed files with 31 additions and 0 deletions
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12
include/linux/msdos_fs.h
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@@ -101,6 +101,7 @@ struct __fat_dirent {
/* <linux/videotext.h> 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)
#define VFAT_IOCTL_GET_VOLUME_ID _IOR('r', 0x12, __u32)
struct fat_boot_sector {
__u8 ignored[3]; /* Boot strap short or near jump */
@@ -138,6 +139,17 @@ struct fat_boot_fsinfo {
__le32 reserved2[4];
};
struct fat_boot_bsx {
__u8 drive; /* drive number */
__u8 reserved1;
__u8 signature; /* extended boot signature */
__u8 vol_id[4]; /* volume ID */
__u8 vol_label[11]; /* volume label */
__u8 type[8]; /* file system type */
};
#define FAT16_BSX_OFFSET 36 /* offset of fat_boot_bsx in FAT12 and FAT16 */
#define FAT32_BSX_OFFSET 64 /* offset of fat_boot_bsx in FAT32 */
struct msdos_dir_entry {
__u8 name[MSDOS_NAME];/* name and extension */
__u8 attr; /* attribute bits */