On Wed, Sep 2, 2009 at 2:45 PM, nidhi mittal hada <nidhimittal19@xxxxxxxxx> wrote:
Hi All
"I am writing for learning purpose a basic filesystem that just mounts
loads super block and root inode from disk."
Now i am facing a problem
when i do
mount -t myfs2 utils/nnn /mnt -o loop ----- it stucks here ....
then doing
ps -ax | grep -i mount shows the mount script is in RL state
where R - is in run queue
L -- pages locked in memory
and i found by using printks that
when i read disk inode block through sb_bread(sb,MYFS_INODE_BLOCK)
then it happens....and sb_bread doesnt return back .
point to be noted is in my code snippet
just before reading inode block i read super block -- it works perfectly but --
as i read inode block it stucks ...
/*****************************
if(!(bh=(struct buffer_head *)sb_bread(sb,MYFS_SUPER_BLOCK)))
{
printk(KERN_ALERT"Cannot read superblock of MYFS \n");
goto free;
}
printk(KERN_ALERT"i m going to read disk inode in block number %d",MYFS_INODE_BLOCK);
/* IT Prints this message and stucks somewhere inside sb_bread*/
if(!(bi=(struct buffer_head *)sb_bread(sb,MYFS_INODE_BLOCK)))
{
printk(KERN_ALERT"Cannot read inode clock of MYFS \n");
goto free;
}
****************************/
i have tested through many ways -- in userspace it shows that inode was written perfectly ...
what can be this thing?
i checked all parameters of sb -- bdev,blocksize,blocknumber okay before sb_bread
any help will be obliging !!
--
Thanks & Regards
Nidhi Mittal Hada
