Re: How to disable fault-around by debugfs?

Hi, Sorry i forgot to change subject line :( Please ignore previous mail On Wed, Nov 12, 2014 at 6:38 PM, lokesh kumar <lokeshkumar.222@gmail.com> wrote:

Hi,

I have a question regarding open systemcall

"open(dev_name, O_RDWR, 0)" -->userspace

suppose devname is /dev/my_device

Now when we look into open file operation, we have prototype "int (*open) (struct inode *, struct file *);"

could anyone tell me how inode and file structure pointer are filled.

I think logic is written in fs/open.c

but i got confused in callbacks used in it.could anyone please tell me which topics should i cover to understand open system call.

Best regards, Kernel newbie :)