mapping of inode and file structure in Open System call

[lokesh kumar]

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.

Thanks.