return ret;
}
-static int fat_ioctl_volume_id(struct inode *dir)
-{
- struct super_block *sb = dir->i_sb;
- struct msdos_sb_info *sbi = MSDOS_SB(sb);
- return sbi->vol_id;
-}
-
static int fat_dir_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
short_only = 0;
both = 1;
break;
- case VFAT_IOCTL_GET_VOLUME_ID:
- return fat_ioctl_volume_id(inode);
default:
return fat_generic_ioctl(inode, filp, cmd, arg);
}
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) */
- unsigned long vol_id; /* volume ID */
int fatent_shift;
struct fatent_operations *fatent_ops;
struct inode *root_inode = NULL, *fat_inode = NULL;
struct buffer_head *bh;
struct fat_boot_sector *b;
- struct fat_boot_bsx *bsx;
struct msdos_sb_info *sbi;
u16 logical_sector_size;
u32 total_sectors, total_clusters, fat_clusters, rootdir_sectors;
goto out_fail;
}
- bsx = (struct fat_boot_bsx *)(bh->b_data + FAT32_BSX_OFFSET);
-
fsinfo = (struct fat_boot_fsinfo *)fsinfo_bh->b_data;
if (!IS_FSINFO(fsinfo)) {
printk(KERN_WARNING "FAT: Invalid FSINFO signature: "
}
brelse(fsinfo_bh);
- } else {
- bsx = (struct fat_boot_bsx *)(bh->b_data + FAT16_BSX_OFFSET);
}
- /* interpret volume ID as a little endian 32 bit integer */
- sbi->vol_id = (((u32)bsx->vol_id[0]) | ((u32)bsx->vol_id[1] << 8) |
- ((u32)bsx->vol_id[2] << 16) | ((u32)bsx->vol_id[3] << 24));
-
sbi->dir_per_block = sb->s_blocksize / sizeof(struct msdos_dir_entry);
sbi->dir_per_block_bits = ffs(sbi->dir_per_block) - 1;
/* <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 */
__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 */