Unable to match the Magic Number

[KrishnaPradeep Tamma <krishnapradeep@xxxxxxxxx>]

Hi,


I am not able to read the super block using the following code. Can
some one help in reading the super block.

read_block is a routine of a driver and debug is just a print statement.

XFS created different allocation groups, and when I try to read the
first block of each allocation group the number returned is the same
but not equal to Magic Number.

    if ((data = read_block(XFS_SB_DADDR)) != NULL) {

                xfs_sb_t *xsb = (xfs_sb_t *)data;
    
                if( xsb->magicnum == XFS_SB_MAGIC)
                {
                        debug(1,"SUCCESS ! Found xfs superblock\n");
                }
                else
                {
                        debug(1,"FAILED Not Found xfs superblock\n");
                }
        }
        else
        {
                        debug(1,"NULL Not Found xfs superblock\n");
        }


Thanks
Pradeep